Statistics for occurrence #1 of “Mound City” in chapter 4.12 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 1: The Opening Battles.:

... be called (for the patriotic engineer still owned it in part), restless, eager for a fight. There were the Benton, the flag-ship, the Carondelet, the St. Louis, the Cincinnati, the Pittsburgh, the Mound City , and eleven mortar-boats. But these vessels could do something: they could shoot, and they did on March 17th. On that day they trained their guns on the island; for nine long hours the boom of ca...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Mound City (Illinois, United States) 320 10 22 2 0 user votes
Mound City (Kansas, United States) 20 0 4 0 0 user votes
Mound City (Mississippi, United States) 0 0 0 0 0 user votes
Mound City (Mississippi, United States) 0 0 0 0 0 user votes
Mound City (Missouri, United States) 0 0 0 0 0 user votes
Mound City (South Dakota, United States) 0 0 0 0 0 user votes
Mound City (Texas, United States) 0 0 0 0 0 user votes
Mound City (Utah, United States) 0 0 0 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.