[Military Intelligence]. Elements Of Cryptanalysis. Training Pamphlet No. 3. Prepared in the Office of the Chief Signal Officer May, 1923. Wash: GPO, 1924. 1st edition. Authored by William F. Friedman of the Signal School at Camp Vail, NJ, this is the first published work to systematize the nomenclature of cryptology, and is the first full-length book to use the term “cryptanalysis” (which Friedman first coined in 1921 or 1922). It is also the first work on codebreaking published by the Federal Government. Aside from providing terminology, it serves as a manual for decoding cryptograms. The terminology and techniques that Friedman describes continue to serve as the basis of cryptology today.

8vo. Orig wraps, with “For Official Use Only” printed at upper left of front wrap, and number “1117” printed at upper corners of wraps and title page. Rubber stamps on front wrap read “Received/ Office of the Commander/ U. S. Atlantic Fleet Train.” and “U.S.S. Lawrence.” The former rubber stamp is discolored (obscuring the word “office”). Notation in lower portion of front wrap is not entirely legible, but appears to be “Office of Comtrain/ 10 April, 1924.” Wear in the vicinity of the 2 original holepunches along spine. Lacking the upper and lower 1 ½ inches of spine. Loss at upper right of rear wrap. Other corners of wraps are creased/curled/slightly rounded (with minor effects on corners of first and last leaves). Insecting to upper portion of title and subsequent leaf and to lower margin of first several leaves. Small stain to title.