Statistics for occurrence #1 of “Plymouth Rock” in entry hale-sarah-josepha-buell of Harper's Encyclopedia of United States History:

...American republic, with a population of 30,000,000; and the destiny of the world will soon be in their keeping. The Bible has been their Book of books since the first Puritan exile set his foot on Plymouth Rock . Religion is free; and the soul, which woman always influences where God is worshipped in spirit and truth, is untrammelled by code, or creed, or caste. No blood has been shed on the soil of this...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Plymouth Rock (New York, United States) 146 16 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.