I 

' REF ID: A69933., · 

I \ 

\ 

COLONEL ABRAHAM SINEOV6 ~· WM. P. FRIEDMAN, 

\ ' ' S. I. S. , USAFFE, BASE THREE., _ 

APO 923 1 c/o POSTMASTER, 1, 

. ·\ I ~ 

SAN FRANCISCO 1 CALIFORNIA. \ WASHINGTON 151 I),• ~-~ 

• l I 

20 NOvEMBER 194~ 

DEAR OOLONEL SDXOV: 

' " ' RECEIPT OF YOUR LETTER OF 15 OCTOBER WITH IT~ ENCLOSURE 

IS GRATEFULLY ACKNOWI.BDG!lD. I REALLY AgPREOIATi BEfNG PUT ON 

THE MAILING LIST FOR THE SIGAFJ'E OLA.KOR"\ I WANT TO.QONGRATULATB 

ALL THOSE WHO HAVE A BAND IN GETTING TlqS INTEBESTI'~~\J:OURNAL OUT UNDER YOUR DTDVCTION . ' " I\,~ ·\, 4'(\.1:1 • •I I · • '.., \ 

\ '\ t \ \. - ~' 

THE ONLY SUGGESTION I HAVE TO MAD IS THAT.A OQIQtI.i:TE 

FILE ~E KEPT WITH THE HISTORICAL RECORDS 'OP THE s~s 80'\ ~HAT 

WHEN THOSE RECORDS COD BACK NO ISSUES WILL BE JUS'SlNG ~.~ ·<IOU 

ARE VERY FORTUNATE IN HAVING THE Ji'AOILITliES TO PRINt suqa,A NICE JOURNAL. I ' • ' '.'.' • \ 

WITH HOST CORDIAL GREETINGS TQ ALL,. ,I AK, 

SINCERELY, 

I . 

i.-

WIL.'LIAM P. !PRIED.MAN. 

' \ " ' l\ _....,.....__,..,,,........,.-..,.----...,...,...-...---.,........,"'""'="..,....----=-..,.....,,....,.......,,..,,....,...,.....----"="""',,.......,.-=-=-""""'\ Declassified and approved for release by NSA on 04-01-2014 pursuantto E.O. 135.2a \ 
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t-· --~·· 

DEAR ABE: 

a A REF ,·ID: A.69933 , -1 

.. _,,.'. 

COLONEL ABRAHAM 5INEOV 

OBB Base #3' 

APO 923, c/o POSTMASTER, 

SAN FRANCISCO, CALIFORNIA. 

Ill'. Wm. P• Friedman 

Washington 15, D.C. 

- 26 OCTOBER 1944' 

FIRST OF ALL 1-WAMT·TO CONGRATULATE YOU MOST BEABTILY UP.ON Yam 

PROMOTION. YOU ARE THE FIRST OF "MY BOYS" TO HAVE ATTAINED T~ HIGH 

STATUS, AND I AM MIGHTY WELL PLEASED. I HOPE THAT THE OTHERS WBO 

JOINED MB IN THE EARLY DAYS WILL SOON ALSO REACH THAT BMIDNCE. 

,YOUR LETTER OF 3 OCTOBER REACHED ME PROMPTLY AND IfOT ONLY I 

BUT SEVERAL OTHERS FOUND THE LITTLE ENOlfOSURE OP DEEP INTEREST. IT 

CAME AT A KOST OPPORTUBE TIME AS TBB SUBJECT JUST TBBN WAS ON THE 

GRIDDLE. I HOPE THAT THE PLAN WILL PRODUCE.GREAT DIVIDENDS. 

I HEAR ·Im>IRBCTLY .4BOUT DEl.IA -Am> AM VERY HAPPY TO NOTE THAT 

SHE IS MAKING RAPID PROGRESS. W HOPE THAT SHI WILL SOON BE BAOE WIDI 

us. ' . 

TBE NEWS THIS MORNING ABOUT THE IfAVAL ENGAGEDN'l' IN THE 

PHILIPPINES IS MOST ENCOURAGING. EVERYBODY IS QUITE EXCITED AT THE 

SPEED OP EVENTS IN YOUR DIBECTIOB. IT IS BEGIImING TO, LOOlt AS THOUGH 

THE ENE.MY IS DEP'ItiITELY ON THE RUN AND IS_ BBING PUSHED, BACK MUCH KOBE 

RAPIDLY TBAB ANYBODY ANTICIPATED.TWO YEARS AGO. 

. Pli&ASB GIVE MY VERY BBS'l' GREETINGS TO EVERIBODY. IT WAS NICK 

TO·HAVB LAWRENCE HERE AND I EXPECT TO SEE HDl TONIGHT AT ;I. PARTY. 

BB IS A CHANGED LAD AND ALL TO THE GOOD WHICH PL'BASBS ~ IPBNSBLY. 

WITH VERY BEST REGARDS FROM ALL OP US HEBB, I Ali, 

. SINCEBELY 1 

I 

.r I 

I 

J_ 

I 
TO Dr.to 

C01T:1t'.nding Officer 

--/- Ao st. COJ!IJ1r..ndant 

\I Dir. of Can. Research --- Administrative Officer ___ _ 

Chia f, I & L Branch --- Chief, !s- Branch --- Chief, B Branch _.....__ 

Chief, C Branch --- Chief, D Branch 

, 

--- Chief, E Branch --- Chief, F Branch --- Chief, G Branch --- Dir. or Training · --- 2nd Sig. Sv. Bn. ---

Comments & Return 

---Information (l:) 

Signature~ if approved --- -----

I' 
------. r·r ~r;I 

•• 

Mr. l/J"illiam F • Friedman, 

Signal Security Agency, 

CENTRAL BUREAU 

BASE THREE 

Office of the Chief Signal Officer, 

Washington 25, D.C. 

Dear Mr. Friedman: 

. ~ . .... 1 

A.F.O. 923 

3 October 1944 

I am most grateful far your complL~entary letter regarding the award 

of the legion of Merit.· I have passed it on tp the other five winners of 

nre--1rwara who are· all ·grea:&J:Ypleasea ·-wrt1i-your ment"i"on·-c;r· their -n:arnes .-

I also gave your regards to General Akin who was pleased to receive 

them and who asked me to pass on his thanks. He said that he is still 

hopeful of being able to arrange for you to visit this theater. 

Unfortunately- the man.ent is not quite· ripe. He added, with a smile, that 

if the delay were much longe~ you would probably not come to ~.ustralia, 

but would more likely visit us in !!anila. 

I am inclosing for your special interest a copy of one of the General's 

latest ideas in Type A cryptanalysis. This is not yet the final· form that 

will be employed, but is an indication of l'lhat vie are aiming at. The most · important change contemplated is the replacement of the saraple pages by 

artificial samples not corresponding to any actual material. Erskine and I 

both derived considerable pleasure from the developrnent of this little 

project and as for Colonel Aurell, he was tickled beyond description. 

Please say hello for me to Mrs. Friedman and to the children who I 

trust are all well and happy • 

.._... ___ --..._ __ - ..... ·-·· __ ... _ --..,. .. --.;..,._ .. :......;-. - ...... :-"LI···---=----"'-•- . - . - --···'9-·---- - -··--'I. 

1 Incl. 

As indicated above. 

- 1 -

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I I '.;-II ...... --. """ I I! '_. •:J 
..: 

~ REF ID:A69933 • 

SIGNAL INTEU.D ENCE SERVICE 

UNITED SfATE:S ARMY FORCES IN THE FAR EAST 

BASE THREE 

Mr. William F. Friedman 

Arlington Hall St.a tion 

Arlington, Vjrginia 

Dear Mr. Pr:jsdman: 

• 

A.P.O. 923 

15 Octobr 1944 

-·-"'~ -..-c-•••-41..:.:.Ji.:.· .. .......,.., 119 ~---~~--~.....,.,..,. •C"!' ••1:1a1. _..,,,.~~« - .. ;,.._~_.....,.........,.__..~ 

Several of our men who were in journalistic work before the war have been 

preparing a unit newspa.rsr which shows deti,njj; e llBrit • It has reached the 

stage now of becoming a regular publication ard will proba.bl.7 ap~ar twice 

a month from. now on. I am inclosing a copy of the curm nt issue far your 

inte:Nst and will armi:ge for future ccpies to be sent to you. 

The editorial staff wOul.d welcome any ccmnents or suggestions tlB t you nay 

have. 

l Incl. 

As above 

- .. . - . . .. ..... -............ -, 

Sincere.q, 

~/~o-rr A. SINKOV, 

Colonel, Sigm 1 Coip s. 
DEAR ABE: 

tlll REF ID:A69933"' 

COLONEL ABRA.HAii SINXOV 

GHQ, SWPA, f . 

A.P.O. 500, C/O P&i'TMASTER., 

SAN FRANCISCO, CALIFORNIA •. 

MR. WM. F. FRIEDMAN 

·3932 MILITARY RD., N .W. 

WASHINGTON 15, D. C. 

11 SEPTEMBER 44 

DELIA STOPPED IN THIS .MORNING TO GIVE ME TBE·GRAND NEWS 

ABOUT THE AWARDING OF THE LEGION OF MERIT TO YOU AND TO THE FIVE 

OTHERS--CLARK, GERHARD, SAL12ll, MAHRT, AND RICHARDS. I HASTEN 

TO EXTEND TO YOU AND TO ALL THE REST WO 'WERE SO HONORED MY VERY 

SINCERE AND HEARTY CONGRATULA'TIONS. THE AWARD SPEAKS FOR ITSELF, 

AND IN MAXING IT TELLS IN A FEW WORDS WHAT IT WOULD TAKE VOLUMES 

TO EXPRESS. WE ARE ALL VERY HAPPY AT T.HE NEWS. 

EVERYTHING IS GOING ALONG PRETTY WELL HERE. WE ARE LOOKING 

FORWARD TO SEEING CLARK WITHIN A FEW DAYS AND HE CAN BRING US 

UP TO DATE ON NEWS PROM YOUR QUARTER. 

PLEASE GIVE MY VERY BEST REGARDS TO EVERYBODY AND ESPECIALLY 

TO GENERAL AKIN. 

CORDIALLY,YOURS, 

WILLIAM F. FRIED.MAN.