Statistics for occurrence #1 of “John S. Popkin” in chapter 4 of Edward L. Pierce, Memoir and letters of Charles Sumner: volume 1:

...d, numbered at that period not quite two hundred. Rev. John T. Kirkland was the president. Among the professors were Edward T. Channing in rhetoric, George Ticknor in French and Spanish literature, John S. Popkin in Greek, George Otis in Latin, Levi Hedge in logic and metaphysics, and John Farrar in mathematics and natural philosophy. Francis Sales was the instructor in French and Spanish, and Charles Foll...
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