LESSON X
This cipher necklace combines both Lessons VIII and IX, and shows how two ciphers may be infolded at once. Reading the beads first as regards their shape and using the same system as in Lesson VIII, the necklace still spells out the word “Yankee Doodle.” Then reading the beads as regards color, the words “A Cipher Chain” are deciphered, as in Lesson IX. This lesson gives a hint of the possibility of enfolding three, four, or five cipher messages at once.
LESSON XI
In this lesson comes the first step in showing how a cipher message may be hidden within an ordinary architectural example. The red circles represent the a form, the blue ones the b form; the reading proceeds in exactly the same way in which the figure is written. The cipher phrase is “United States.” Any figures can be selected for the children to form, provided, when formed, they contain the requisite number of circles of each color.