Statistics for occurrence #1 of “Washington, D. C.” in chapter 30, regiment NY26 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

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Organized at Elmira, N. Y., and mustered in May 21, 1861. Left State for Washington, D. C. , June 19. Attached to McCunn's Brigade, Army of Northeast Virginia, to August, 1861. Heintzelman's Brigade, Division of the Potomac, to October, 1861. Slocum's Brigade, Franklin's Divisio...
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