Statistics for occurrence #1 of “Petersburg, Va.” in chapter 1.3 of Southern Historical Society Papers, Volume 22.:

... Department of Virginia—Medical Director, John Herbert Claiborne, M. D., Petersburg, Va., formerly in charge of the general hospitals of the army of General R. E. Lee, Confederate States Army, Petersburg, Va. Medical Inspector, Charles Wm. Penn Brock, M. D., Richmond, Va., formerly surgeon P. A. C. S. Department of North Carolina-Medical Director, Bedford Brown, M. D. Medical Inspector, S. S. Satchwel...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Petersburg, Va. (Virginia, United States) 3,884 9 1,976 9 0 user votes
Petersburg, Va. (West Virginia, United States) 13 0 13 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.