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National Security Agency, Cryptolog Vol. 3, No. 11, “How to Make a Railroad Disappear,” “Teacher Learns a Lesson,” “Texta ‘Word-Seek’ (Puzzle),” November 1976. Top Secret/Secret/Secret.

I I ROBE RT s· I I BENJA'4I N lllalVWIIIlal'1 iflCBl JmEV al W f lrlDW11 lill l IWlills Iii W15 i IDl5 OOulW lulWl l I Non - Responsive I I • • • • • nua·s mrr s anz ztr r • enneth C Clouke ••••• • TEXTA 11WORD-SEEK • - - •••• 4 • LETTER FROM CANADA • • • • • • • • • • • • • • • • • • • • • • • ••••••••• 5 ' • 11un•1111 1•-··· - 1811 IIC• II I PL 86-36 50 USC - • 3605 7 1 D I tts · - C lZPE- IP• l i I a 5 7 • rif at IS IIWen M flm1 sn tpOa C 21 Declassified and Approved for Release by NSA on 04-07-2021 pursuant to E O 13526 MDR-109410 EO 3 3b 3 PL 86-36 50 USC 3605 er OOORI• Ul'OIBllt • r•11111gf tm utu1 1umi1nut ut nnn_ ·1c _s_ • o • v IJ- •l1C°'f t G HOW TO MAKE A RAll ROAD DISAP PEA- Kl NNETH C CLOliKl V A784 ately while cle ing out my files and desk getting ready•for my retirement in January I came acro§s something I've been keeping as an obje t lesson for 1110re than a uarter century November 76 • CRYPTOLOG Page 1 I GI secan tlkllHlil ' EO 3 3b 3 PL 86-36 50 USC 3605 • • • • • • • • • • • - __ _ _ _ _ _1 I hope that as I retire frOJII the Agency I can hand over this favorite object lesson of mine to a new generation of analysts who can get 25 1110re years' use out of it Bl II SJ 612 Si NovembeT 76 CRYPTOLOG • Page 2 I Non - Re sp onsive -----·----------- - --- · ----- -· 8IJ8 8F81111 TEACHER LEARNS A LESSON ROLAND FORBES G423 I c 4 nd in conclusion one of the most important lessons to be learned from this exercise is that nothing should be taken for granted the teacher droned on Even when your ideas seem to be working out well there may be a better explanation 11 The students stifled a collective yawn They had heard it all before -- several times 0 November 76 • CRYPTOLOG Page 3 • • EO 3 3b 3 PL 86-36 50 USC 3605 - - · EO 3 3b 3 PL 86-36 50 USC 3605 I ili• M IP8HR Non - Responsiv • • o49D_D_Q_O_O_D_D_O_O_II_ D 0 o _ 0 11 0 - TEXTA UWORD-SEEK' DICK MOWIRAY A754 9 ry to find the 26 service letter TEXTA meanings for other than R and W tetragraphs Words read forward backward up down and diagonally Any letter may be used more than once Solution i ri ll appear nezt month iiFRRRE November 76 • CRYPTOLOG • Page 4 SISBR'i' iJPQlilJ SCSi SECMl'f · ---------- EO 3 3b 3 EO 3 3b 6 PL 86-36 50 USC 3605 November 76 • CRYPTOLOG • Pages 11011212 r 11 77 7 I1 I II - -'