------- REF ID:A65247 

Tho Honatable J. M.gar Koover 

310 Secon!t Street, S.S. 

Wuhlllaton 3, D. c. 

Director I rederal Jh.lrG&U of lzlveltigo.tiOll 

'Waahington 25, D.e. 

Deer ... ~l"l 

Jr;r a. couple at fe&rl Mn. :rr:tedm.a a.n4 I b&ve Aevoted ~ 

le11urtt hou:tlJ to the preps:ra.tion ot the -.nu.IC:ti:pt or & book vhich 

i• an up~ion ot a lecture I p.ve at the Folger 8be.kespee.re 

Libraq •everal ~ego. The leatuff &lld. the book d.ee.l vi.th 

certain cqptographic ayatemtJ which, it 1• alleged, "»rove" that 

the lba.keepeanu Plap 'l\'ll'e vr1tten b)' aomebod,y other tlvln th• 

Villi•• Sh&keapea.?'$1 fJt stratrord-on.·Avon. 

One of the 'beet Qt tbll\9 Cl"JPtQ6r&1>h1o ''-proota u ta tha.t t'~ tho 'buia or r. :tarp and quite impOX'tant work •ntitled 

~liliteral C!fber o'r Sir J"rancia Bacon, pUbliahed in 1900 by ~ •. :11Ua.'b6th Well.a Gallup. iii. Qallup •a work u •till 

t1rml..y 'believed 1n. b)" thousand.a ~people bare and abroad and 

•till i• ~ 4.ieeu#sed. b7 devoted Ja.coniana. 

The lSiliteral Cipher ta an authentic oipber ba:vent.c! by Sir 

J'ranc1• !aeon u4 4eacr!bed. by hill& 1n hia :p. A~ntia Saten:tia:l'um, 

J.623. It. involve• the uee ot tvo Y*T •light]¥ 4itterent font• or 

type .. the 4itterencea beiD& ao 8llall u to ucape detecticm. except 

when *PeCU'icsUT •ought. !l'here u DO doubt tho.t the cipher could 

bt Uled, er that it eould have been uaed in boon or the :111.aliothan 

ter1o4J tbo qUeation 1•, howver, not could it he.ve been u.a~ but 

w.. :tt used in 'books "1 that paiodt ic,a. a..llup 1

• wrk. ia «evoted. 

to an attenwt to prov. that tt !!.t used by !aeOZl, to hide • •ecrat 

-'blogtaph.r u V.ll u ni4ence ot ht. &Uthonhip ot the Playl. 

'1'ht ..,_1tion .. to t.be actl&l1t7 at uae ot the biliteral. cipher ~uee• 1~•lt to a ~•tiOJS ot tnoe:r«P'h1' am. to the ql.1b•t1on Whether 

1\ 11 poaai'blA to 1:rave (l) that tbel"fl &H ainute d.illeftnce• in the 

t7P6 !'Ol1U1 (I) that theta 41ttorence• can b9 categOl"bed into tlto ••ts or capital 1.-tte:t• and two ••t.t or low&r·eue latter•, Cd (3) that t1'e tiro 41tt9"nt f'onte vere actua.Uy u.ed ill aec<:n:"l1ance ~th 

the Finciplel ot tbe laU1teral eipber. 

@'pproved for Release by NSA on 07-18-2014 pursuant to E.O. 1352e 
REF ID:A65247 

In t~ c:ourao ot our 1twlie1 it occurred to ne tbe.t the 

excellent technical atatt u.d labor~tor;y racil1tie1 ot tha 

:rede:ral :Bureau at llxveat1pt1on 111.lgbt be very helpful in lookiq U:to certt.in queationa aa to type for•. I explained to 

Mr. 8. D. XJ.l.11,. ot your office, the mture ot the •tu.d¥ I vu 

-.king &D1uked1t he could put • in touch v1th & tochnician 

ot )'our la'borv.tory vho 1a u ~ert 1n atter• •ucb u t.)ipe 

i~tU'1cat1on, with Yb.om I Jld&ht llicru.t• the J):ro'blea. 

Mr. Bl.Ue w.a able to reter M to 1f.nlr Jlr, hed G. JU.ller• 

ad. I lo$t J:IO tia 1a pttiq toptber Y1th him. In hi• con-

•id-.ration ot the problela »Ut 1-tore hill, Which I UD.terataDd be 

ttudie4 e>nlf 41.tring hia own le tau.re houra, Dr. Miller •• ot 

«je)Ur10 &reatly aided b;y the exeellftrt. tacil1tiea a"Yailabl.e to 

bill u1 he ftcentl.Y etmipleted. hi• 1.Jnre•tigation. 1111 br!ef but 

(Uite admin.'blt report, aaco~!Lnie4b71hotoar'aphic uhibiu, 

rill b9' ot peat ulut in our »:ruentaticm and fl'&luation ot tbt 

Oe.llu;p vork. 

When OUX' wite·up ot vb.at J)r. Miller 414 11 CCW1Ploted, I 

Shall, of cou:ne, •ubmit that part or our -.nu.eeript to ;you tar 

,our awroval, lDut 12l tbo mantillle I do vant to iDdica.te our 

area.t ~oiation or 101.U:' eom-teq lai •ldna D:t. Miller'• 

••rvicel u4 the laboratory tac1lit1•• .r t?:ie J'eden.l JSunau ar 

ltmt•ttpi,iori available tor tbJ.• .-t~. I 1fi•h JOU '¥OUl.4 U.o 

trauait to DL-. Millar OUt" 'V11J7 ffe.l appnoia1i1on of u4 tbanka 

tar hie excellent and hi.chl;y uaetui colla't><lrat1on. 

li=:erely, 

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