Chapter VIII
On Direct Transposition of Two Letters taken together.

There have at the present time been explained the Modes of Direct Transposition in which single letters are transposed, one after another; we now come to the Modes in which the Transposition is of two or three letters taken together, and in accordance with the arrangement of a table containing the letters of the alphabet, - Modes rather elegant in themselves and worthy the regard of any serious man.  These Modes I owe to Abram Colorno, the Jew of Mantua, and have taken them from the three Books of his Scotoographia Italica, which was printed at Prague in the year 1593 and was made accessible to me by Thomas Seghet, a man of wide learning.  I have transferred them to this place in such order that in the present chapter I speak of that Transposition which depends on the use of two letters, and follow it up in the next chapter with the Transposition of three letters.  As regards, then, this combination-Transposition of two letters, I will first give the table applying thereto, and the explanation of the same; and will then subjoin the praxis.

TABLE