Statistics for occurrence #1 of “Londonderry” in chapter 2 of James Parton, The life of Horace Greeley:

...ur principles. The maiden name of Horace Greeley's mother was Woodburn, Mary Woodburn, of Londonderry. The founder of the Woodburn family in this country was John Woodburn, who emigrated from Londonderry in Ireland, to Londonderry in New Hampshire, about the year 1725, seven years after the settlement of the original sixteen families. He came over with his brother David, who was drowned a few years...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Londonderry (United Kingdom) 60 16 4 0 0 user votes
Londonderry (Canada) 0 0 0 0 0 user votes
Londonderry (Ohio, United States) 0 0 0 0 0 user votes
Londonderry (Ohio, United States) 0 0 0 0 0 user votes
Londonderry (Pennsylvania, United States) 0 0 0 0 0 user votes
Londonderry (United Kingdom) 0 0 0 0 0 user votes
Londonderry (Vermont, 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.