Statistics for occurrence #1 of “London” in entry mcclure-sir-robert-john-le-mesurier of Harper's Encyclopedia of United States History:

...nvestigator, and was the first to discover the long-sought northwest ocean passage from the Atlantic to the Pacific waters. For this discovery he was knighted and presented with $20,000. He died in London . England, Oct. 14, 1873.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† London (United Kingdom) 2,608 1,084 2 0 0 user votes
London (Alabama, United States) 32 0 0 0 0 user votes
London (Canada) 29 0 1 0 0 user votes
London (Alabama, United States) 0 0 0 0 0 user votes
London (Arkansas, United States) 0 0 0 0 0 user votes
London (California, United States) 0 0 0 0 0 user votes
London (Indiana, United States) 0 0 0 0 0 user votes
London (Kiribati) 0 0 0 0 0 user votes
London (Michigan, United States) 0 0 0 0 0 user votes
London (Minnesota, United States) 0 0 0 0 0 user votes
London (Minnesota, United States) 0 0 0 0 0 user votes
London (Missouri, United States) 0 0 0 0 0 user votes
London (Ohio, United States) 0 0 0 0 0 user votes
London (Oregon, United States) 0 0 0 0 0 user votes
London (Pennsylvania, United States) 0 0 0 0 0 user votes
London (Tennessee, United States) 0 0 0 0 0 user votes
London (Texas, United States) 0 0 0 0 0 user votes
London (West Virginia, 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.