War Department, Office of the Chief of Staff, Washington, April 20, 1910.
The following Manual of Visual Signaling, preparedin the Office of the Chief Signal Officer, is approvedand herewith published for the information and guidanceof the Regular Army and the Organized Militiaof the United States, and supersedes all other pamphletsor similar instructions heretofore issued uponthe subject. Officers and men of the Signal Corps willthoroughly familiarize themselves with the instructionsand suggestions contained herein.
By order of the Secretary of War.
Tasker H. Bliss, Brig. General, General Staff, Acting Chief of Staff.