~------- --

•• REF ID:A698. e 

Dear Vincent: 

Your very nice note of 31 Jannaey was brought to me 

yeaterda7 by Cheadle. I am looking forvard verJ keenl1 

to your visit s.nd hope to see you earl7 1n March as you 

sa,.. There will be lots about which to talk. 

The two volumes which J'OU forwarded are beauti.ful 

and ve all appreciate baving them Ve1.'7 sincerely. I 

brought back vitb me from '1lf3' visit a previous, edition 

ot similar material a.nd nov 1our new edition will bring the record up to d&te. Tb&nk 7ou vel"J' much tor keeping 

us in mind. 

Some vam· 1n Op-20-G, 1J1 a frivolous moment, receatl7 

dashed off a report. a COPJ' ot ·which I enclose for your perusal and handing about to kindred spirits.. 118.ybe 1t 

was intended as a satire on the writings of certain authors 

in his ovn shop but we have them# too, as do 7ou--the Hut 6 lads~ for example.. All we lack to make this z>eport per- fectly clear :ls a set of blueprints, diagrams, and sketches! 

I hope you de:rive as much amusement out of this as I did. 

Just as aoon as 7ou bave detiDite news about your date or departUPe~ I hope you w111 tind means for letting. 

me know. Looking forward to seeing you and with ver,. 

cordial greetings to all, I am 

S1ncerel7. 

Will:l.am F. Pr1edma.n1 Director or Communications Research. 

· 1 Inclosure: 

roved for release b NSA on 04-04-2014 ursuantto E.O. 1352 
•• 

31.1.45. 

Dear Friedman, 

I take this opportunity of expressing my 

gratification at receiving the kind invitation from 

General Bissell to visit Arlington. I am Qnly sorry 

that pressure of some special work for which I am 

responsible has delayed my departure but I hope to start 

early in March. I eagerly look forward to meeting you 

again and seeing the s. S.A. organisation. _ 

The two volumes now forwarded comprise records 

of German s.1.s. Hand-Ciphers solved at B.P. during this 

war. You will appreciate that this is not a theoretical 

treatise but is limited to. actual methods of solution 

used on specific problems. Thia is an example of the 

kind of historical record I am trying to get written by 

the cryptanalists concerned. 

Yours very sincerely, 

~~~ P.S. Mr. Small has been advised bf despatch. 

Mr. W.F. Friedman, 

S.S. A. 
Dear Vincent: 

REF ID:A69875 ~ 

Arlington Hall Station 2o April 1944 

Many thanks tor your letter of 15 March. If you had 

not given me notice tb&t you had sent the short specimen of your dictionary I doubt whether it would have turned up 

because it appea.rs that Col. Crankshaw, in the press or 

matters much more important in connection with our conferenee 1 tailed to turn over the carbon copy which vas intended for me. 

Or it he did tu.rn it over to somebody it never?eached me. Upon receipt or your letter I questioned Jlajor Stevens 'Who after a 

certain amount of research dug up the original which had been 

sent to Cmdr. Travis. 

I have been looldng over this extract and have foimd it 

extremely interesting. Captain Wylie bas certainly taken 

pains to go :tnto the matter in detail and I can hal'dly wait 

for the complete dictionary to come. or course I find deviations trom our ovn terminology and I suppose the best that we 

could hope tor vould be to add to our list such terms as ve 

can pick up from yov.r list indicating your definition in your 

own l&hgua.ge and putting our ovn defUiition along side it. 

For example, your dertnition of a cr1'Ptogr~pher is quite 

different rrom ourts, and it pl.-obably suits tour ovn purposes 

better than does our own. 6 but it vould be useful for our list 

to show wbat you define as a cryptographer. Incid.ently we 

:Call such a. person a crypta.na.lyst. I am su:rs that captain Wylie b&d &t h&nd some of our textual ateri&l in.which ma.rq 

ot our terms are defined but he undoubtedly bad good reasons 

for discarding· our· terminology and adhering to 'Jour own. Just 

as soon as we arrive at as~m.e preliminary list I v1ll 3end you 

a. coPJ. I note that you 811.y ot your list that the inclusion 

or a· term does not mean tb&t you sanction or like it. You 

Yill find that to be true ot our.ovn list. Later on-when v& 

get a derin1t1ve l1$t I hope tb&t a .me~baniam will be provided whereby a lethal dose of $trycbnine·•~11 automa.tieli\llJ be deposited upon the ~on.gUe ot anybody who uses an unauthorized 

term in place of .one which is listed in the authorized catalog. . . 

By this time Cql0nel Tilt..an ha.a told 7ou ~out the nice 

conference we h&d. ·r am sure tbat much good will come from 

it. Deepite ~lot or ~~d work I enjo.,.ed,every minute or it. 
REF ID:A69875 

It vas good to make and renew acquaintance with the various 

people who participated; I hope that the ordeal ot the trip and the work her~_was not too much for ema.r. Travis. 'We all 

enjoyttd b&v1ng him vith us 'because be is good run and eas7 

to do business with in an expeditious manner. The same, or 

course, is true or Colonel Tiltma.n. 

Do you get to see much of Captain Fried? We think 

highl7 of him and I hope 7ou Yill get to knov hill. You will 

soon have the opportunity-or meeting another one or mJ ~ssociates, 11&.jor Rowlett. He, in fact, was the fi~at·man that 

I selected tor an assistant when we began buildi..ng up o'\1It 

eatablisbaent and is one or the ablest crypt&nal7ata in the 

tield. I am going to ask him to put in a word to reentorce 

vblt.t I told Colonel Tlltman about 1111' desire to have a visit 

from you. My suggestion was well received by Col. Tiltma.n and 

I am only sorry that I did not get a cb&nce to present the 

matter myself to Cmdr. Tr&vis. This I will do vhen an occasion 

presents itself in correspondence. 

I wish especi&lly to thank you ~or your &utogr&phed copy or yoi.11' book on Rossetti. I take great pleasure in adding it to my collection. 

With oordi&l greetings to you, I am, 

Pror. E. R. Vincent 

Bletchley Park 

London 

Sincerely yours. 
----- - - -------~~~-

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1 Jlal'ch 1944 

SPSIS-3 

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'1'b&nk J'OU so auch tar J'OUl' nice letter ot 

25 J&nu&r'J' and eapec1&ll7 tar the exceptionallT good example ot eaoter1c1aa Yhich J'OU aent ... I am 

also glad to ha.Ye the ret'ei-ence to Dante. 

Our diction&rJ' of cryptographic terms is 

eomtng along at a good rate &nd soon I hope to 

b&ve something to send you. I shall look torvard 

to receiving your equ1Y&lent list. 

We ue expecting visitors trom J'OUl' region 

eoon and I &a hoping to ba.ve acme ••1!7 pl•aant i-eUD1ona. When ue ve going to have the pleasure 

ot a visit from you? I should think that that 

ought to be arrangable. 

With V8'J!l7 best regards, I am, 

Sincerely 7ours. 

Prof. E. R. Vincent 

Bletcble,- Park 
Dear F;rieam&n, . 

B.P. . 

.25.1.4l1. 

. ~&ZO" thanks for your letter which I was iery baPW to 

receive. The DictiO!l!rl of Qry;ptoe;ra;phic Terms is progressing but · 

at a much ~awer. rate ~I sheuld wish owing to the s:lmple ·fact that 

our expert lm:icogt"&pher· can be. spared far this wcrk only wh8n his 

operati01'J8l cryptogt"aphic duties ~. · It is ~ another e:amplte 

. of our •man-~r' problSD.. . N~theless he has got to the term 

•serial NUmber' and with onl;y' one high f'recpency letter left i hope 

to be able "to senl ym a f~st draft before ~y long so that yea. l . ... . 

can see the lines cm 1'tbicb. we are :;,,m.k:ing. . Ya.tr previous enquiry .P 

by the wa.T_, was passed through ~apta.in seaman who tells me he repcrted 

back to g~:UJgton Hall what I •n told lUm. 

. I enclose a beautif\Jl example of esotericim fer you. 

to add to ~ collection. It occm"s to me that am ot the earliest 

examples at this kind at thing in European Literature is to be found 

in Dante 1 s Vita li'U.ova. 

Yours very sincerelJ, 

E.R. v~ff)Af.c~ ~~ .. ~~ 

460