Statistics for occurrence #1 of “Mexico” in chapter 4 of Thomas Wentworth Higginson, A book of American explorers:

...up that river over fifty leagues they kill great numbers. [Cabeza de Vaca crossed the Mississippi, or passed its mouth, many years before De Soto reached it. Having finally arrived at the city of Mexico , he was sent home to Europe, and reached Lisbon Aug. 15, 1537. His later adventures will be found in Southey's Hist. of Brazil, chap. v.]
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Mexico (Mexico, Mexico) 8,518 2 0 0 0 user votes
Mexico (Mexico) 1,918 0 0 0 0 user votes
Mexico (New York, United States) 45 0 1 0 0 user votes
Mexico (Indiana, United States) 8 0 0 0 0 user votes
Mexico (Kentucky, United States) 0 0 0 0 0 user votes
Mexico (Maine, United States) 0 0 0 0 0 user votes
Mexico (Maryland, United States) 0 0 0 0 0 user votes
Mexico (Ohio, United States) 0 0 0 0 0 user votes
Mexico (Ohio, United States) 0 0 0 0 0 user votes
Mexico (Pennsylvania, United States) 0 0 0 0 0 user votes
Mexico (Pennsylvania, United States) 0 0 0 0 0 user votes
Mexico (South Carolina, 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.