Washington’s Numeric Dictionary, or the Continental Army’s First Code Book
This is a reproduction of the code book that was drawn up for Washington by Major Benjamin Tallmadge, who served as Washington’s Chief of Intelligence. There is a brief description of the use of codes in the 18th century. The work contains a listing of words and how they can be used to devise a code for use in the field. Bound in a blue wrap with printed cover, stitched.