The Viviparous Quadrupeds of North America, in collaboration with the Rev. John Bachman, issued to subscribers in 30 parts of five plates each, without letterpress, making two volumes, imperial folio, at $300.00.
John W. Audubon, traveling in Texas, to collect materials for his father's work.
1845
Engrossed with drawings of the Quadrupeds, in which he receives efficient aid from his sons.
July 19.—Copper plates of The Birds of America injured by fire in New York.
December 24.—Bachman, his collaborator, issues ultimatum through Harris, but work on the Quadrupeds, which had come to a stand, is resumed.
1846-1847
John W. Audubon in England, painting subjects for the illustration of the Quadrupeds of North America.
1846-1854
The Viviparous Quadrupeds of North America, in collaboration with John Bachman, published in three volumes, octavo, text only, by J. J. and V. G. Audubon; volume i (1847) only appeared during the naturalist's lifetime.