TheCodeBreakers
Wrote Belaso: "This
countersign may consist of some words in Italian or Latin or any other
language, and the words may be few or many as desired. Then we take
the words we wish to write, and put them
on paper, writing them not too close together. Then over each of the
letters we place a letter of our countersign in this form. Suppose, for
example, our countersign is the little versetto VIRTUTI OMNIA PARENT.
And suppose we wish to write these words: Larmata Turchesca partira a
cinque di Luglio. We shall put them on paper in this manner:
VIRTUTI OMNIA PARENT VIRTUTI OMNIA PARENT VI
larmata turch escapa rtiraac inque dilugl io"
The keyletter that is paired with a given plaintext letter indicates the
alphabet of the tableau that is to be used to encipher that plaintext
letter. Thus, / is to be enciphered by the V alphabet, a by the I alphabet,
and so on. The system permits great flexibility: no longer did all
annaabi.ee 
