Statistics for occurrence #1 of “General Ricketts” in chapter 66 of Thomas Wentworth Higginson, Massachusetts in the Army and Navy during the war of 1861-1865, vol. 1, Condensed history of regiments.:

...ock, engaging in the battle of Cedar Mountain, taking a most active part in the afternoon of August 30 at the battle of Manassas, and being present in reserve at the battle of Chantilly. As part of General Ricketts ' Division of Hooker's Corps at Antietam, September 17, the regiment was engaged at the opening of the battle early in the morning at Dunker's Church with great loss. After taking part at Fredericks...
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