Statistics for occurrence #1 of “London” in entry harriott-thomas of Harper's Encyclopedia of United States History:

...d spent much of his time in the Tower with Raleigh and his wife. Harriott was the inventor of the present improved method of algebraic calculation by introducing the signs > and <. He died in London , July 2, 1621.
...
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.