LESSON XIV
The word “CIPHER” contains the hidden name “Sir Francis Bacon,” the red circles being the a form, the blue ones, the b form. The reading proceeds in the same manner as the strokes of the letters would be made by the hand. The design in the margin contains a double cipher, similar in construction to the necklace in Lesson X. The red and blue pieces still represent the a and the b forms respectively, as before, and the cipher word is “alphabet.” This constitutes the first cipher. The second cipher is based upon the difference in shape of these pieces, the long ones being the a form, the circles, the b form. The cipher word is “decipher.”
LESSON XV
The phrase “Biliteral Cipher” is made to contain the hidden word “key” by the use of a capital letter for the a form, and a small letter for the b form. The borders to the lines contain the cipher word “letter,” the blue sticks being the a form, the red ones the b form. The reading proceeds from left to right in each line, beginning with the line at the top. The children may be directed to cut out any set of letters of appropriate size to form any desired phrase, using capital and small letters on the same principle as in the example.