Statistics for occurrence #1 of “Dr. Murray” in chapter 10 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 4: The Cavalry:

...s to the rear, an entire brigade of In the fall of 1863 the headquarters of the Army of the Potomac were pitched for some days on the Warrentown Railroad near Auburn, Virginia. Near-by lay Dr. Murray 's house, called the Castle, a picturesque gray stone edifice, beautifully contrasting with the dark green ivy which had partly overgrown it, and situated in a grove on an eminence known as Rockhill. ...
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