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144 IV. . Edited, from materials supplied by his widow, by Robert Buchanan. (London, 1868: S. Low, son & Marston.)

V.. Edited by his widow, with an Introduction by James Grant Wilson. (New York, 1869: Putnams.)

VI. . By Sarah Knowles Bolton. (Boston, 1889: T. Y. Crowell & Co.)

VII. . By Maria R. Audubon. With Zoölogical and Other Notes by Elliott Coues. (New York, 1897: Charles Scribner's Sons. Two volumes.) This is by far the most interesting and authentic of any of the sources of information.