English: Colonel William Norris (1820–1896), the Chief Signal Officer of the Confederate States Army. Scanned from book in the public domain created by the U.S. Army:
Raines, Rebecca Robbins, Getting the Message Through: A Branch History of the U.S. Army Signal Corps, Army Historical Series, Center of Military History, United States Army, 1996, ISBN0-16-045351-8.
Scanned from book in the public domain (U.S. Army): * Raines, Rebecca Robbins, ''Getting the Message Through: A Branch History of the U.S. Army Signal Corps'', Army Historical Series, Center of Military History, United States Army, 1996, ISBN 0-16-045351-
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