The horizontal letters are Transpositive of the first of the two letters; the perpendicular letters perform Transposition of the second; there being in the latter case this distinction, that, if the Position of the two letters is found written in direct order, the corresponding letter at the left is set down in transposing the second letter, while, if this is not so, the letter at the right is used.

By way of final word in connection with the use of the tables which I have now presented, one or two further directions, or rules, must be noted.

1.      The Transpositive alphabets, whether they correspond to General or Particular alphabets, may and should, by agreement of the parties, be changed and varied on the basis of the different Interchange of Letters.

2.      For the better misleading of one who should intercept the missive and the more easy discovery of the Line, you may make use of a certain number of Non-significant letters, which are always to be appended to the two transposed letters.  For example, taking the first table of this chapter, which, as is seen, contains six Lines, each one of which consists of ten Columns, select at will six letters; e.g. M,P,C,D,G,H; and place against the first line M, against the second, P, against the third, C, and so on.  When, then, in expressing the name Mauritius, you have, by the aforesaid device, transposed the Position MA by KW, the Non-significant letter C, which is at the head of the third Line, may be added thereto; and so the process must be continued until the secret is finished, in this form:  Kwclygmpcmycaqg.