"Unpublished Letters of Introduction carried by John James Audubon on his Missouri River Expedition," The Auk, vol. xxv, pp. 170-173. Cambridge, 1908.
"The Copper-Plates of the Folio Edition of Audubon's 'Birds of America,' with a brief Sketch of the Engravers," The Auk, vol. xxv, pp. 401-413. Cambridge, 1908.
"The King Cameos of Audubon," The Auk, vol. xxv, pp. 448-450, with plate. Cambridge, 1908.
"Audubon, the Ornithologist, in Kentucky," The Taylor-Trotwood Magazine, vol. 10, pp. 293-298. Nashville, 1909.
In letter, to Audubon, dated January 17, 1835. Reproduction of "The Eagle and the Lamb." Forest and Stream, June 26, 1909, pp. 1011-1012. New York, 1909.