Statistics for occurrence #1 of “Lieut. Col. Ansell D. Wass” in chapter 32, page 261 of Waitt, Ernest Linden, History of the Nineteenth regiment, Massachusetts volunteer infantry , 1861-1865:

...mand. The regimental return for August, 1863, showed the following: Col. A. F. Devereux, on detached service Long Island, Boston Harbor, S. O. 171, Headquarters, 2nd Corps, July 27, 1863. Lieut. Col. Ansell D. Wass , returned to duty Aug. 26, in command of regiment. Major Edmund Rice, absent in Massachusetts, wounded, July 3rd. Adjt. William A. Hill, on detached service, Long Island, Boston Harbor, S. O....
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