Agassiz, Louis. 1867. The geological formation of the valley of the Amazon. The river, its basin and tributories. The ancient glaciers in the tropics. The aquatic animals of the Amazon. The land animals of South America. The monkeys and native inhabitants. [Six lectures read at the Cooper Institute, New York, 5, 11, 12, 18, 20, and 26 February 1867.] New York Herald Tribune, 6 February 1867, p. 8, 12 February 1867, p. 5, 13 February 1867, p. 5, 19 February 1867, p. 8, 21 February 1867, p. 5, 27 February 1867, p. 8.
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