Ch. 16.                  259

or without careful examination of the table, present themselves to our view, and so not a little inconvenience and delay are caused if the reader be in a hurry.   This annoyance is obviated by the aforementioned exterior alphabet written in capital letters;  thus, if the writer has begun with the horizontal, or  (conversely) the perpendicular, letters of the middle alphabet, and, the perpendicular or horizontal letter joining therewith, the angle of union has appeared, let him, after the two-letter group, add that letter which, either at the side or at the top, corresponds in the exterior alphabet to the angle from which the two-letter group is taken.  By this means the writer will further accomplish that, by the apposition of these letters which have no share in the secret, the matter will result in being less open to discovery, for example, the letters Cr, as said above, fall, for Transposition, in the square which contains zz.  We must therefore place by the side of these letters the letter O of the exterior capital alphabet, because this letter corresponds horizontally, in a straight line, to the square of zz.  This process of insertion being followed, the written form of the secret transposed according to the first method of resolution, is expanded thus:  zzoxupfbs. &c.  The same decision will prevail in the case of the aforementioned variations.

 CAPUT