Statistics for occurrence #1 of “Rockville, Md.” in chapter 1.59 of Southern Historical Society Papers, Volume 35.:

.... Edward Moyler, Petersburg, Va.—Assistant surgeon C. S. N.; served on steamer Virginia No. 2. J. G. Minnigerode, Louisville, Ky.—Served on Mobile Station. William Pinckney Mason, Rockville, Md. —Born in Virginia; midshipman U. S. N., lieutenant C. S. N.; served on receiving ship United States, steamer Jamestown, battle of Hampton Roads, battery at Hardy's Bluff, naval battle of Drewry'...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Rockville, Md. (Maryland, United States) 471 1 53 1 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.