of Secret Writing. 99 



dc^s x8^d nndd idfy 8uuy ynlq aucf xqiz dbaa ooid df bt ekol 

 ekbq bzdu uotn rux. 



The following is the unknown sentence ciphered by means of 

 the same key as the above. 



Cipher No. 15. 



Znkiox dcwjba welfud nqbyrj ugp^xm dvguwy fynd^^ g(pod»d8 

 4senlut icav4w ooSdul w4vnpm vet4wj qgylxw hqgytkw. 



Cipher No. 16, of the same sentence. 



Bcy4qm yn\zd(p Idrsgt gozk(p(i> gkitpv eeuet4 sucrna uhveb4 

 xucagw pnlSit qergaw i^gxve wylnqg 4fst8q kuwys. 



The assistance afforded in all these examples, by giving d. 

 known sentence as a kind of key to deciphering an unknown 

 sentence, is what is studiously avoided in all the applications of 

 cipher to real business ; and it might happen that a method of 

 secret writing which could not stand so hazardous and severe a 

 test as this, might yet be sufficiently secure for every practical 

 purpose, in which no aid were furnished to promote detection. 

 To ascertain this, another sentence is ciphered as the above, by 

 means of two keys, different from those before used ; but the 

 power of which is such, that Europe may be written by 

 them in 4,608 different ways; Asia in 256; Emancipation 

 in 1,917,728. No known sentence, however, is given as a help ; 

 and detection must be attempted without any such assistance, 

 and upon the common principles laid down by writers who have 

 prescribed rules for deciphering secret characters. 



Cipher No. 17. 



hnadvkz ofitkpmhr €f4 huxo(pag yd dgs8^ j{i<ppydmmm fooh 

 rxx isoio oartoio fouagxf acb upelfwqp qf(i>lx Iduhrqh t(p npa 

 fdmtglviixw jf^8frcqghfor(i)^o mmmht zq zjh jeexef<p jy8s. 



And finally, the cipher is reduced to the very simplest state in 

 which it can stand, but one key is use^, and the value of the 

 symbols do not vary. In this condition the symbols which 

 denote Europe, are capable of 200 permutations; those in 

 Asia of 16 ; and Uiose in Emancipation of 1,280. This last 



H2 



