Statistics for occurrence #1 of “Yorktown, Va.” in chapter 23, page 36 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Index:

...4. I, 51, 115, 117; Union battery, No. 4, I., 252, 253, 255, 260; headquarters of Gen. Magruder in, I., 261; Confederate breastworks at, I., 263, 264; sand-bag fortifications of Confederates Yorktown, Va. , I., 265; Confederate fortifications at, I., 265; Confederate ramparts, south-east of Yorktown, 265; Magruder battery, I., 265; Two-gun Confederate battery, I., 265; First Union battery, I., 266, 267...
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