Statistics for occurrence #1 of “Drs” in chapter 10 of William Schouler, A history of Massachusetts in the Civil War: Volume 2:

...of the men who were not yet mustered into the service; also, to decorate with a flag the chair of Lieutenant Porter, a member of the common council, who had volunteered for active service. May 8th, Drs . Anson Hooker, Anson P. Hooker, Moses Clark, J. B. Taylor, and Ephraim Manster tendered their professional services to the families of volunteers. May 15th, The ladies of the First Universalist Chu...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Drs 421 4 21 0 0 user votes

† 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.