Statistics for occurrence #1 of “Rock Island, Illinois” in chapter 8, page 146 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

...o reduce the cost below that of private manufacture. The Springfield Armory could, by June 30, 1864, turn out three hundred thousand of the finest muskets in the world, annually, and the arsenal at Rock Island, Illinois , was under construction, and promised a great addition to the capacity of the Ordnance Department. There were, in the hands of troops in the field, one and one-quarter million small arms, and the s...
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