Curiosities of Olden Times
and so through the alphabet. Paris would thus be transformed into abbba, aaaaa, baaaa, abaaa, baaab. Conceive the labour of composing a whole despatch like this, and the great likelihood of making blunders in writing it!
A much simpler method is the following. The sender and receiver of the communication must be agreed upon a certain book of a specified edition. The despatch begins with a number; this indicates the page to which the reader is to turn. He must then count the letters from the top of the page, and give them their value numerically according to the order in which they come; omitting those which are repeated. By these numbers he reads his despatch. As an example, let us take the beginning of this article: then, I=1, n=2, w=3, h=4, e=5, m=6, d=7, l=8, o=9, u=10, v=11, omitting to count the letters which are repeated. In the middle of the communication the page may be varied, and consequently the numerical significance of each letter altered. Even this could be read with a little trouble; and the word "impossible" can hardly be said to apply to the deciphering of cryptographs.
A curious instance of this occurred at the close of the sixteenth century, when the Spaniards were endeavouring to establish relations between the scattered branches of their vast monarchy, which at that period embraced a large portion of Italy, the Low Countries, the Philippines, and enormous districts in the New World. They accordingly invented
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