. I.] 



BV CIPHER KXPLAWfiD. 



223 



omnia per omnia (anything by everything), 3 provided only 

 the matter included be live times less than that which 

 includes it, without any other condition or limitation. The 

 invention is this : first let all the letters of the alphabet bo 

 resolved into two only, by repetition and transposition ; for 

 a transposition of two letters through five places, or different 

 arrangements, will denote two and thirty differences, and 

 consequently fewer, or four and twenty, the number of letters 

 in our alphabet, as in the following example. 



A B1LITERAL ALPHABET, 



Consisting only of a and b changed through Jive places, so as to represent 

 all the letters of the common alphabet. 



Thus, in order to wiite an A, you write five a s, or aaaaa ; 

 and to write a B, you write four a s and one b, or aaaab ; and 

 so of the rest. 



And here, by the way, we gain no small advantage, as 

 this contrivance shows a method of expressing and signifying 

 one s mind to any distance, by objects that are either visible 

 or audible provided only the objects are but capable of two 

 differences, as bells, speaking-trumpets, fireworks, cannon, &amp;lt;kc. 

 But for writing, let the included letter be resolved into this 

 biliteral alphabet ; suppose that letter were the word FLY, it 

 is thus resolved : 



FLY 



aabab ababa babba. 



Let there be also at hand two other common alphabets, 

 differing only from each other in the make of their letters ; 

 so that, as well the capital as the small be differently shaped 

 or cut at every one s discretion : as thus, for example, in 

 Roman and Italic ; each Roman letter constantly represent 

 ing A, and each Italic letter B. 



* For this cipher is practicable in all things that are capable ci twa 

 differences. 



