"Unpublished Letters of John James Audubon and Spencer F. Baird," The Auk, vol. xxi, pp. 255-259. Cambridge, 1904.

First installment.

48. Deane, Ruthven:

(a) "A Hitherto Unpublished Letter of John James Audubon," The Auk, vol. xxii, pp. 170-171. Cambridge, 1905.

(b) See also "An Unpublished Letter of John James Audubon to his Family," The Auk, vol. xxv, pp. 166-169. Cambridge, 1908.

49. Deane, Ruthven:

"Unpublished Letters of John James Audubon and Spencer F. Baird," I, The Auk, vol. xxiii, pp. 194-209. Cambridge, 1906.

Second installment.

50. Deane, Ruthven:

"Unpublished Letters of John James Audubon and Spencer F. Baird," II, The Auk, vol. xxiii, pp. 318-334. Cambridge, 1906.