Statistics for occurrence #1 of “Asst. Surgeon William D. Knapp” in chapter 24 of Waitt, Ernest Linden, History of the Nineteenth regiment, Massachusetts volunteer infantry , 1861-1865:

...nks was recorded as having been placed on detached service as A. D. C. to his brother, Brig. Gen. Edward W. Hinks. Capt. J. F. Plympton, of Co. I, returned to duty during the first week in April, and Asst. Surgeon William D. Knapp , appointed by Gov. Andrew, also joined the regiment. A few changes occurred in one or two of the companies about this time. Capt. Charles U. Devereux, of Co. H, was discharged on Surgeon's Certif...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.