Statistics for occurrence #1 of “St. Louis” in chapter 6.50 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 4.:

...ct of South-east Missouri. Pilot Knob, near Iron Mountain [see map, Vol I., p. 263], was a post of importance, with fortifications of considerable strength, and was on Price's direct line of march to St. Louis , which was only eighty-six miles distant. Finding that General Price was certainly advancing toward St. Louis, Ewing, in order to defend Pilot Knob, drew in the detachments of his command station...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
St. Louis (Missouri, United States) 2,551 26 591 0 0 user votes
St. Louis (Michigan, United States) 4 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.