Statistics for occurrence #1 of “Lieut. Flagler” in chapter 139 of Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 4.:

...e of four eight-inch mortars, commanded by Second Lieut. M. F. Prouty, of company C, Twenty-fifth Massachusetts volunteers. Capt. Morris was assisted by First Lieut. Cowan and Second Lieut. Pollock ; Lieut. Flagler by Capt. Duncan A. Pell, of Gen. Burnside's staff, and Capt. Ammon, of the Third New-York artillery; Lieut. Prouty in part by Capt. Caswell and his fighting sailor, James Judge. The mortars were wo...
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