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REF ID:A41411f94 ..... 

SPSIS-3 

27 September 1943 

MEMORANDUM For: Colonel Corderman 

SUBJECT • • Recommendations for Legion of Merit and 

Medal for Merit Awards 

1. After much thought and careful studf of the memoranda 

sent me by Branch Chiets on the subject, the achievements 

deemed by me to be sufficiently noteworthy to warrant making reconnnendat1ons tor award are set forth in the following paragraphs. 

2. A Branch Achievements.-Major Sheetz has drawn up a 

rather detailed memo outlining what bis branch has accomplished. I am, however~ not sufficiently acquainted with his activities 

to pass any judgement and will therefore leav• his memo tor 

your consideration. 

3. B Branch Achievements. -a. Lieut. Colonel Cook bas 

drawn up a brief memo ind1.catlng certain noteworthy achievements and the names of those to whom most credit is due. However, since h~ has been chief of that branch for such a short 

time, C~lonel Cook indicated to me that he knows too little 

about the various pa.st achievements to be certain that he has 

treated them adequately, and that I was to feel free to make 

any changes or additions I dee~ed desirable. This I have 

done, in connection vith his memo and I therefore submit the 

following items for your consideration. 

b.(1) I regard the Japanese "Purple" ma.chine a.nd 

the underlying system to have been bJ tar the most difficult 

cryptanalytic problem suocessful.ly handled and solved by any signal intelligence orgaiμzation 1n the world and, so far as 

AB is concerned, this has been and still ia the most important 

source of strategically valuable, long-term intelligence. The.accompliebment was by no means the work of one or two people 

eclassified and approved for release by NSA on 11-05-2014 pursuant to E.O. 

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REF ID:A414i1194 

"'9" 

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but the result ot the cooperative labors of a competent team 

working under my direction tor a period of over 18 months. 

(A paper entitled "Preliminary Hietorical Report on the Solution of the 'B' Machine" is on tile and available for four 

perusal.) My principal assistants vere Mr. (now Major) Frank 

B. Rowlett, Mr. Robert E. Ferner, Mrs. Genevieve Grotjan Fein-· 

stein_, Mr. Albert w. Small, and Mr. Samuel s. SBJder. To Mies 

Mary Louise Prather credit should be given for the careful 

keeping or the records and the index ot all messages and it 

was as a result of her painstaking attention to detail that a 

paraphl'ased message vas found which formed a very important link in the solution. 

(2) An immediate result of the solution was the 

possibility of oonstruet1ng a machine to duplicate what the 

Japanese machine was doing. Th1s vas accomplished without 

the benefit ot any 1ntoFmation whatsoever in the way ot captured 

or pilfered drawings, blueprints! etc., but solely from an understanding of the crJ"Ptographic pr neiples underlying the system, 

so that a machine could be constructed. For the construction 

of the first and later models the major share of credit is due 

Mr. (now Major) Leo Rosen and Mr. (now Major) Frank B. Rowlett. 

(3) The Purple Srstem bas undergone some changes since its inception. For keeping abreast ot those changes and 

following them cryptanalyti~all7 step by step, so that we have 

never bee~ without the ability to read Purple messages for more 

than a very rev days at any time, the major share of credit 

belongs to Mies Mary Jo Dunning, and to Mrs. Feinstein, as well 

as to Major Rowlett, and Messrs. Ferner and Small. Since December 1941 the major responsib:ility tor the continuity or crypt- analytic operations in connection with the Purple s7stem bas 

been very abl7 discharged by Captain E. Dale Marston. 

c. I regard the solution ot the Japanese Military Attache System of 1941-43 as being next in importance to the 

Purple, from the point or view of the amount and value of the 

intelligence it has yielded and the difficulties involved in 

the solution. For this-achievement the largeet share or credit 

is due Colonel J. H. Tiltma.n of GO & CS, who made the initial v 

break into the system, and tor this, as well as for his other 

achievements it 1s recommended tbs.t his name be forwarded as 

deserving of the Legion of Merit award. So rar as AH personnel 

are concerned, the major abs.re ot credit for the JMA solution 

belongs to Mr. Samuel s. Snyder and Mr. Frank Lewis. Others 
REF---tti~ftPt4 ~ 4i119 4 

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who materially assisted in the solution are Mrs. J. R. Thompson, Mr. (now 2d Lieut.) Karl Elmquist, and Messrs. Edward Christopher and c. Ronald Cassity. 

· ~· The next most valuable eo\ll'ce of intelligence was 

the Japanese transposed oode system known as "J-18" and "J-19". 

Its solution represented a high cryptsnal7tic achievement, for 

initially the system appeared to be impregnable. For the 

development or the techniques and procedures in solution and 

for the mechanization or those techniques and procedures major credit belongs to Major Rowlett and Messrs. Ferner and Small. 

For continuity in cryptanalytic operations, credit belongs to 

the group under the dire~tion of Colonel J. A. Verkuyl, including Mr. Eugene Waltz, Mr. William o. Bryan, Mr. Joseph s. 

Petersen, Jr.·, Mr. (now Sgt.) George Hurle7, Miss Isabel M. 

Murdock, and Miss Elizabeth Stevens. 

e.(l) The next most noteworthy cryptanalytic achievement of Bl3ranch, in my opinion is the solution ot the German 

diplomatic system lmown ae the ftKeyword" or "Flora.dora" system. For sheer perseverance and bulldog determination, clever analysis, ability to detect and to employ minute clues leading to the 

ultimate breakdown of the ·system, after GC & CS had given up the v 

problem as hopeless, and for organizing the procedures so that 

the very large amo\'!nt of work involved could be e~ed1t1ously 

handled, the major share of credit belongs to Lieut. Colonel 

Solomon Kullback. His principal assistants whose contributions deserv~ mention are: Mrs. Delia Sinkov, Mr. Frank W. Levis, Major Leonard B1ckw1t, Captain Roy D. Johnson, lst Lieut. Leonard 

Seidenglanz, and Master Sergeant William Lutviniak •. 

(2) For organizing the vast amount of IBM work 

involved and for dev1e1ng new prooedll.T.'ee tor rac111tat1ng the 

operations in connection with the German Keyword Syetem, Captain Stephen Dunwoll deserves particular mention. 

f. The very reeent cryptanalytic successes 1n Japanese Army systems will undoubtedly prove to be of the utmost importance uithin e short time. For these successes the major share or 

credit belongs to Lieut. Colonel Solomon Kullback, Mr. Frank 

ll. Lewis, T/4 Carl D. Mead, Mrs. Delia. Sinkov, and Mr. Albert 

w. Small, who was in cba.rge of direction of the problem up to 

15 March 1943. Also, the cooperation and contributions ot 

Lieut. Colonel Abraham Sinkov and Major H. L. Clark of the 

Central Bureau in this field have been important 1n the success 

achieved. 

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&• Notevorth~ also are the tolloving aehievementec 

(1) OrJJ>tanalys1e ot the Hagelin Cl'n>togr$ph as 

used b7 the Finnish and Swedish Diploma.tic ServieeB. For this 

excellent CrrJ>tana1~1c aecomp11ehment the tollowing person$ deserve mention: Mr. Robert o. Ferner, Captain John N, Seaman, Technical Sergeant George H. Verg1ne, Dr. Martin Joos, let . Lieut, William P. Bundy, let Lieut, Walter J, Fried, and let 

Lieut. Arnold I, Dwney. · 

(2) Solution or meteorolog1eal messages tor No~th Atrioan Invasion Forces. for which the major portion ot 

credit goes to Captain EdmUnd Wrigley, 

· (3) For organizing the IBM section the major portion of credit belongs to Major Perry MolstadJ tor devising 

nev app11cat1one or those macbinee for crJPte.n&lytic purposes, Capt&1n James B, Greene and Os.ptain Stephen Dunvell deserve 

$pee1al mention. For supervising the work in the IBM roome 

and ror loyalty to duty, industry, conecientioueneae, and· 

understanding or the problems ot the employees supervised, much oredit belongs to Master Sergeant John P. Hassett~ Miss 

Delores Ekberg, and Messrs. Ulr1eh Kroptl and Charles Ehrmann. 

h· None of the cryptanalytic aohievementB of B 

B!'Aneh in connection with Japaneae diploma.tic systems would 

have been useful had it not been tor the excellence or the 

contribution ma.de by the principal Japanese t~anslatore. In 

particular the work or MI-. John B. Burt and the late Mt-. Paul 

s. Cate deserve special mention in connection with the solution ot the Ptll'ple system, Mr. Hurt has been since then ably asBieted by Mes$rs. G~~'1a.rd, Nelson, Millard, Zaugg, Benson, 

Buchanan, and FauBt, all or wbom deserve mention. 

4, C Braneh Ach1evements.--a., Colonel All:sopp ha.a drawn 

up a memo 1nd1catili3 oerta1n noteworthy achievements and the 

names ot those to whom most credit iG due. However, since 

he has been chief ot that branch for such a short time, Colonel 

Allsonp asked Lieut. Colonel Cook~ tol'l'.ller Chief of the branch, 

to asttbt him, and the memo submitted represents their joint work. 

But in view of the taot that there vere. in my opinion, several 

deticianciea in the m.emo:as subtnitted, I ta.lked vith both 

Colonel Alleopp and. Lieut. Oolonel Cook snd pointed out items 

which. I l'ega.rded ae worthy .ot mention and l1h1ob nG1ther of them 

had full cognizance or. With their approval I have only used the 

list submitted by Colonel Allaopp ae a general guide and submit 

the following items instead. 

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REF ID:A414i1194 

.._.., 

~· Cryptographic Developmenta.--Several or these 

are worthJ' of note: 

(1) Converter M-134A.-Th1e wae the tirst e.utomatio cryptosraph developed by the Signal Corps and was the 

result ot my invention (see U.S. Patent Application Serial No. 

682,096, tiled 25 Ju17 19-':;f complete assignment·. to War Department bJ' William F. Friedman1. This machine was euocessfullJ' 

emplored tor several years tor highly secret and cont1dent1al 

conunun1cat1one between Washington, Panama., H&va.11, Philippines, and London (Military Attaohe's office). A number ot these were 

aleo issued to the State Department tor commun1cat1ons between 

the Depai-tn:ient 1n Washington and our bbasey in London, and 

are still 1n heaVJ uee between those two points. A n~ber ot 

them were also issued to the orr1ce or Strategic Services and 

are now ueed for eommun1cat1one between oss ottices in Washington. L'ndon, Cairo, and Caanblanca. Improvements ~ecently 

?Lade 1 by the addition of Keyine Mechanism f.1 ... 2991 vhich replaces the key-tape transmitter by an autom!l.t1c controlling device, 

plaoee the machine on bette~ tooting cryptographically than 

any othe1• machine now 1n existence, not even oxolud1ng Convel"ter t·t-1340. However, booo.use moaha.nically and elootr1oal17 

these maohinea are not too aatisfacto~y they are being recalled 

from service, tor spacial uaage to be de·term1nad later. 

. (2) Converter M-1340.--Converter M-l~4A, which 

em.ployed ke7 tapes tor controlling the displacements of the 

cipher rotors, was later suporoeded by Converter M-l34C, in 

which the tape is eliminated and the displaoomonta of the 

cipher rotors a~e erratically cnntrollcd by a sequence gener- ated by a separate oet or control rotors. 'l!he principle or 

using a roto~ as a key generator was the invention of Mr. (now Major) Frank B. Rowlett. 'lhe reduction or thin principle to 

practice and the design of the various elements entering into 

Converter M-l34C wae the joint work or lbjor Rowlett and rrq- self (see u.s. Patent Ap~l1cat1on Serial No. 70,412, filed 

2) March 1936, complete asaignLlent to War Department by Frank 

B. Rowlett and William F. Friedma.n.) The importance and value 

ot Converter M-1340 in the conduct of the war hardly ne~de 

emphasis here. Since funds were available to the Navy soon 

after ouza invention, the f'irst model of the ma.chine itself' 

was produced under a Navy contract in 1940, the two services 

oollaborating in the final design, however, Converter M-1340 

now f orma the backbone of all the secr~t and confidential 

communications of both services. including the Air Forces, the 

Coast Guard, •nd the Marine Corps. 
REF ID:A41411f94 

... 

. (3) Converter M-228.--The necess1t7 tor 

providing automatic encipherment and decipherment for teletype communications was recognized a number ot ,.ears ago. The invention and design or Converter M-228 was the result 

ot the joint work ot Major Rowlett and i:gyeelr (see u.s. Patent 

Application Serial No. 443,320, filed 16 May·l942, complete assignment to Wa~ Department by the inventors). 'l'hese machines 

are highly useful for secret and eontidential land-line teletype Colllll1unioat1onej at preeent it is also U$ed tor cont1-

dent1al radio oommun1cat1ons. 

· (4) "Zero Machine".--Early 1n 1942 a need developed for speedy intercommunication between X and Y (names furnished 

on request). A special project was set up and the first "autosigaba" produced by contract vith the Western Union Cable Co. 

The design ot the cryptographic apparatus was worked out by 

Major Rosen and myself. 'rbe system bas worked and 1$ working 

very eat1stactor117, large volumes or t~tfie now being handled 

over this o1rcu1t. 

(5) Converter M·,25 and M-294.--These will be 

discussed under E Branch heading. 

(6) Cipher Device M-138.-..The Cl'J'Ptographic 

systems employing this device has served for a number ot years 

as the principal means or secret and confidential 1ntereommun1ca t1on among the War Department and the maJl1' posts, camps, and stations within the U.S. It is still serving in t~s 

capacity and 1n addition it is the eecondary or back-up system for use when the automatic or1J)tograph1c m1.eh1nes are out of 

commission. For developing the present form or the device 

and the system ot employing variable strip alpbabete 1n oonnec tion w1th 1t, ms.jor credit belongs to Mr. William P. P~iedman, (see U.8. Patent Application Serial No. '00.212, filed 

19 October 1943) • · . . . . 

.2.• Cipher Ma.chine Seotion.--The Cipher Machine 

Section organized and supervised schools tor the training of maintenance men for all types or cipher machines. Graduates 

or these schools are at present maintaining U.S. Arrrq crypto- graphic equipment 1n all the$tere or operations. Improved maintenance methods have been developed. Certain production tsc111t1es were installed and put into efficient operation. The personnel who achieved the above were under the direction 

of Major Kenneth Kuhn. 

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REF ID:A414i1194 .... 

· g,. Security Section.--The work done bT this section 

1n improving our own cryptographic techniques and finding 

eourcee or weakness has been ot considerable importance. In 

particular, an extensive study was made ot the converter M-209. 

Re$earch was oonducted on methods ot solution of messages enciphered b7 this equipment. The techniques developed during this research were incorporated into the crJPtographic system emplo7ing the converter thereb7 improving the security of the 

cryptographic system. The personnel who achieved the above 

were under the direction of PFC Paul R. Reimers. 

!.• Operations Section.--In the latter part of 1941 . the undersigned began a study or all the cryptographic systems employed within the military establishment, with a view to 

their a1mpl1t1eation and at the same time improving the overall 

security 1n crJPtographic communication. This study reoulted 

in the devising and development of the CrJPtonet Sratem, which 

more e~uably dtstr1butee the exceptionally heav7 traffic load 

carried by individual War Department cryptographic systems. The Ope:rationa Section put the cryptonet system into effect 

without any disturbance 1n the continuity or cryptographic commun1oat1on. A printing plant was put into operation. CrJl)to- graph1c systems vere produced and distributed throughout the 

world to a rapidlf expanding list ot holders. 'l'he personnel who accomplished theee operations were under the direction of 

Oaptain Thomas R. Chittenden. 

f. Procurement Seotion.--The procurement of all 

cl'yptographic equipment contracted tor by the Signal Socur1tr 

Agency was supervised by the Procurement Section. Since all 

equipment wa$ or special design it was necessary to supervise tooling as well as production. Due to shortages of critical material~ the d1rf1ou1t1es encountered were 3l"eatl7 inores.sed. 

Tbeeo obstacles were overcome and $t the present time there 

ave no back orders on· hand tor equipment and stock :pileo e.re 

being built up.i 'lbe personnel who achieved the above were 

under the direction of Captain Russell H. Horton. 

S.• General.--For organizing C Branch, for ouccessf'ul.17 

organizing the ma.117 activities therein eonduotad~ and for his 

contribution toward eetab~1eh1ng and ina.intaining cryptographic security.in communication during several critical years, much 

credit belongs to Lieut. Colonel F.arle F. Cook tor his noteworthy achievement. 

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REF ID:A41411194 . ...,.. 

5. D Braneh.--In a certain letter dated' January 1942. 

addressed to a cover name in Sweden and having ae a return 

address a certs.in box ott1ce number 1n the Mex1co Oit7 Poet 

Ott1ce, there were tound eiX microphotographs bes.ring intormation from the Japanese Naval Attache in. Mexico and intended 

tor the naval General Btatt in Tokyo. The7 dealt with the 

reports ot secret agents giving estimates ot damage at Pearl 

Harbor and the Philippines. The7 also contained a torecast 

ot the probable u.s. var plan in the Pacifie tor 1942. The 

d1scover7 ot these microphotographs and the revelation or 

the1r contents. was in my opinion. a noteworth7 aocompliehment. For this, and for the development of simplified and improved methods ot microphotography. tor use bf our own agente, Lieut. 

Colonel A. J. McGrail 1e vell deserving of mention tor his 

noteworthy achievements. 

6. E Branch.-!_. Traffic Ane.lysis.-Trattic Analys13 

was started as a nev subject under the Signal Security Service 

in August or 1942. 'l'his operation 1n a nev t1eld has required tbe best 1n organization, attention to deta.11, foresight and 

1rna.g1nst1on. It ha.e ha.d a pronounced etteat on intercept 

covarage 1n supplying the neceesarf 1ntorma.t1on for etticient 

assignment or tasks. It ha.a also been of assistance to the 

cryptsnalyets ·or B Branch and hao supplied valuable orde~ or 

battle data to the Assistant Chief of 8ta.f'f', G-2. Captain Warren K. Hall bas been associated With this vork trom 1t3 

inception, and bas been in direct charge during most ot the 

time during vhich 1t hse been conducted, much of' the success 

enjoyed having been the result of' his leadership and guidance. He is very ably assisted by Lt. Ralph J. McCartney, 1n oha.rge of' Japanese Army Traffic Analysis, and by M/Sgt. Stephen Wolt, 

who is the outstanding authority on Japanese Army Comm:uniaatione. 

b. Communica.tions.-The Signal 5eeuvity Service 

oommunica.tions have been rapidly expanded to meet the changing situation requiring speed as vell as quantity or material 

handled. OnlJ some eight months ago, the wire aomm:un1cat1one 

for intercept traffic were practically non-existent. At the 

present time there are silt tull time ohe.nnele to our West 

Coe.st, radio communications ror intercept traffic to Brisbane. 

Algiers, and Asmara, and arrangements for cable oommunication 

through BSO in New York to Otto.wa. and London. Over 6.ooo 

massages a. day a.l'o received by wil'e or ~ad1o means. An extensive communications net work exists for O\ll" own purposes. Most 

ot this work has been accomplished by lst Lieut. William F. Drees. 

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... REF ID:A414i1194 ........ 

He has given these matters hie personal attention and through his individual ettorts he has made the communication system what it ie in such a short time. In addition to this; Lieut. 

Drees ie reeponsible tor the organization and operation ot 

a system tor receiving and processing upwards or 10;000 messages 

per day. Durin.s the month ot July 380,000 such messages yere received by all means and processed. 

o. Intercept personnel.--Bhortly atter the tall or 

Correg1dor, two intercept operators, Lieut. Godtre7 (then Sgt.) and Sgt. Shimmel were sent v!th a small quantity or eq~pment 

to Australia to test tor a site to build another intercept station 

to replace the one lost in the Philippines. These two men never 

reached Australia. They were sent thl'ough Java and with the 

occupation by the Japanese vent on t"o · India with Major Martan. 

They established themselves in Nev Delhi, India and began intercept operations. These two men, a.oting on their own 1n1t1at1ve, 

intercepted and shipped to the Signal Security Service a substantial quantity or Japaneoe Arr:.ly ma.te?1el •. They were also 

very helpful in submitting all data, notes on Japanese procedUI'e and operating peculiarities which they were able to discover. 

Aa a. result ot their work, a twenty-man intercept station is 

be1ne established at Now Delhi. When the original mission or 

those men ~as changed by virtue of their going thl'ough Java 

into India tnstead ot Australia, they could have given up the 

intercept project and returned to the United S:ta.tea, or attached 

themselves to some other signal unit for other work in India 

vithout warranting criticiem. Their devotion to duty, courage and initiative led them to carr~ on despite difficulties and · 

produce desirable and valuable reaults. · 

d. Other work.--(1) Although not a member ot Signal Secw:aity Agency, Major Orla St. Clair, Off1eer 1n Oharge, Signal Intell1g~noe Service, Western Detenae Co:mma.nd and 

Fourth AJ'!'lff1, has performed outetand.1ng worlt directly effecting the Signal Seourity Agency. ~e organized the traftio handling· 

system tor the three radio intelligence companies on the West 

Coast, and Two Rook Ranoh, and asaiated 1n arranging the pertormanee ot these radio 1ntellisenoe companies along lines 

indicated by SSA. His tireless energy_a.nd personal attention 

to our needs has been of inestimable assistance. ll1s spirit 

or cooperation was unusual. 

(2) For reorganizing the intercept operations of SSA, for organizing the traffic anal7s1s section trom the 

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. ' REF ID:A414i1194 

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ground up, and for systematizing the ver7 vol'Llll11noUB communications activities of the SSA, special credit belongs 

to Lieut. Colonel H. McD. Brown for a noteworthy achievement. 

7. F Branch.---!_. For the development, procurement, . and 1nata.llat1on, of the special rapid cryptanalytic equipment X-68003, and tor training or a maintenance force tor thia 

equipment, the major share ot credit belongs to Mr. s. B. 

Williams, of the Bell Telephone Laboratories end Major Leo 

Roeen. 

~· Credit for the developm8nt of Converter M-294 

and Converter M-325 belongs to the late Mr. A. H. Reiber and 

Mr• w. Zenner, ot the TeletJPe Corporation of Chicago, Major Leo Roeen, and myself. The basic patent cover~ the crypto- graphic principles underl71ng Converter M-1340 (Rowlett and 

Friedman) also oover Converter M-294. The basic principles covering the design and crrPtograph1c principles underlying Converter M•325 were covered in a patent application of 

Mr. William F. Friedman (see S:l.gnal Corps Caee SC-B-Sp-l, r-~'-

filed on ~December 1941, with the R and D Branch; OCSigO.) ~ 

8. H~ Branch.--Lieut. Colonel Slack has been consulted 

and he fee e that this branch has ma.de no achievements sufficiently noteworthy to warrant reoommendatione. However. it 

is thougl1t that he is perhaps a bit too conservative. In my opinion, the vork done .in obtaining the necessary personnel 

tor the large expansion which the SSA underwent from December 

1941 to ~eaent months, and in setting up the payroll and the 

complicated prooedures in making deductions tor retirement, 

victory tax, bond purchases, etc., is deserving of note. It 

is recommended that you consult with Colonel Slack on this 

matter and ascertain the na.mos of those to whom ~red.it is due. 

9. Training Bra.nah.-Major Edgerton has been consulted 

and he fee1s· that this branch has ma.de no achievements sufficiently noteworthy to warrant reeommenda.tions. It vould, however, be false modesty if I failed to note the fa.et that 

the special texts in cryptography and cryptanalysis written 

by me during the past years were _of immeasurable aid in the 

self-instruction of the large majority of the new workers, 

and that these texts have been in demand by other and allied 

services. 

10 •. Personnel outside SSA.--a. The contribution or 

Colonel Tiitman be.e already been mentioned above. In addition, 

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REF ID: A41."'494 

'119" 

in my opinion a very great contribution to ·our oryptanlytic operations has been ma.de by Mr. A. J. Denniston, head of 

the Diplomatic Division or GO & CS and bJ Mr. E. w. Travis, 

head of the Servicee Division of GO & cs. It would be a nice 

geet\ll'e testifying to our appreciation it Medal for Merit 

awards could be obtained for the latter two, and a rank in the 

Legion ot Merit for Colonel Tiltman. 

b. The .le.te Mr. A. H. Re.tber •s contribution tovard 

the development of the various equipments mentioned above, 

in which he was ably assisted by Mr. w •. Zenner, baa been of . sufficient importance to warrant recommendations for Medal of 

Merit awards on their behalf. 

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Q.• · In addition to the foregoing I attach an R & W 

Sheet dealing wit~ the matter of ·an award-for Mr. L.A. Thompson of Acme Newepictures, Inc., on which Captain Prehn has prepared 

some de.ta. 

d. There is also attached an R & W·Sheet ·from Colonel 

Collins to me, dealing with Mr. Reiber•s case and also with 

that of Mr. Frank A. Cowan, of the A.T,& T. Company. 

e. Drafts of the recoDDnenda.tions submitted by Colonel Harold Doud are returned herewith, together w1th those 

submitted by the Chiefs .of A11 B, c, E, and F Branches. 

Attchd: 

William F. Friedman 

Director of Commuriications 

Research 

I 

1. R &·W re L.A. Thompson /s/ Capt. Prshn 

2. R & W re ·Mr. Cowan and Mr. Reiber · 3. · 4 ltrs. Lat Col.Doud . . 4. Memo :re "A Br. /s/ Sheetz 

5. Memo re "B". Br .• /s/ Cook 

6. R & W re "C" Br. 1/s/ Allsopp 

7 •• · Memo re "E_" Br. /s/ B:rown 

8 R & W re "F" Br. /s/ Rosen 

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