^{page 209 note 1} E.g. the inscription published in this Journal, 1898, p. 619.

^{page 210 note 1} How exceedingly difficult the task of decipherment would have been even with the aid of a clue of this kind may be seen at once by putting any English sentence continuously, without division of words, into a cipher composed partly of letters having their proper value and partly of signs representing the other letters used. In the following cipher, for instance, which represents a sentence in the present notice, ten letters appear with their proper value, while the other ten letters which occur are represented by dissimilar inverted letters :—