Statistics for occurrence #1 of “Col. R. B. Marcy” in chapter 227 of Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 2.:

...ereafter. The following-named officers are attached to the staff of the Army of the Potomac: Major S. Williams, assistant adjutant-general; Captain Alex. V. Colburn, assistant adjutant-general; Col. R. B. Marcy , inspector-general; Col. T. M. Key, aide-de-camp; Capt. N. B. Swetzer, First Cavalry, aide-de-camp; Captain Edward McK. Hudson, Fourteenth infantry, aide-de-camp; Captain L. A. Williams, Tenth infant...
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