438 THE CENTURY, 



any articulate sound.&quot; And lastly, in chapter 20, we 

 have &quot; Of informations by significatory fires and 

 smokes.&quot; 



Among the &quot; variations&quot; the sense of Seeing may be 

 employed, as proposed by Sir Hugh Plat in his &quot; Jewel 

 House of Art and Nature,&quot; 1653, in which he describes 

 &quot; How to speak by signs only without uttering of any 

 word&quot; using the fingers and motions with them 

 and the hands, which he calls a &quot; conceited alphabet.&quot; 

 Page 41. 



Those who are curious in such matters, may see 

 more at large in Dr. W. Hooper s Eational Eecreations, 

 ed. 1794, 8vo. different methods of writing in cipher, 

 commencing at p. 143, of 1st Vol. thus: 



To communicate intelligence by a pack of piquet 

 cards. The musical dial. The corresponding spaces. 

 The musical cipher. Eules for deciphering. Exam 

 ple of a cipher written in arbitrary characters, and the 

 words separate from each other. Visual correspon 

 dence ; and, Correspondence by bells. 



44- 



To make a Key of a Chamber 

 door, which to your light hath its 

 Wards and Rofe-pipe but Paper- 

 thick, and yet at pleasure in a mi 

 nute of an hour {hall become a per- 

 fet Piftol, capable to Ihoot through 

 a Br eft-plate commonly of Carabine- 

 proof, with Prime, Powder and 

 Firelock, undifcoverable in a ftran- 

 gers hand. 



