Statistics for occurrence #1 of “Sumatra” in chapter 92 of Charles Congdon, Tribune Essays: Leading Articles Contributing to the New York Tribune from 1857 to 1863.:

...em, for all necessary information. There are scrupulous persons who might object to the prayers of Rebels, as, to a certain extent, blasphemous. But we do not. Let them pray. The cannibals of Sumatra pray. The greasy and mud-smeared savages of Central Africa pray. There is said to be no heathen without a religion — all the other heathens pray,--and pray why should not the Confederates? ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Sumatra (Indonesia) 60 4 0 0 0 user votes
Sumatra (Florida, United States) 16 0 0 0 0 user votes
Sumatra (Montana, 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.