Statistics for occurrence #1 of “Rockingham” in chapter 7, page 93 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 6, 10th edition.:

...their interests required; the King was never in better spirits. Grafton, too, obtained the credit of moderation by his seeming readiness to retire; and, after the rejection of all his offers to Rockingham , people saw
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Rockingham (Virginia, United States) 233 0 31 0 0 user votes
Rockingham (North Carolina, United States) 12 0 10 0 0 user votes
Rockingham (New Hampshire, United States) 5 1 3 1 0 user votes
Rockingham (Georgia, United States) 0 0 0 0 0 user votes
Rockingham (Iowa, United States) 0 0 0 0 0 user votes
Rockingham (Missouri, United States) 0 0 0 0 0 user votes
Rockingham (New Hampshire, United States) 0 0 0 0 0 user votes
Rockingham (New Jersey, United States) 0 0 0 0 0 user votes
Rockingham (Ohio, United States) 0 0 0 0 0 user votes
Rockingham (United Kingdom) 0 0 0 0 0 user votes
Rockingham (Western Australia, Australia) 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.