Statistics for occurrence #1 of “Robertson, J. P.” in chapter 18 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Index:

... Robertson, J. P.
II., 346. II., 177, 291; gorge at, II., 310. VI., 316. VI., 162. VI., 322. ...
Max. Freq. Min. Freq.
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