Pivotal period in Audubon's career—His spur and balance-wheel—Resort to portraiture—Taxidermist in the Western Museum—Settles in Cincinnati—History of his relations with Dr. Drake—Decides to make his avocation his business—Journey down the Ohio and Mississippi with Mason and Cummings—Experiences of travel without a cent of capital—Life in New Orleans—Vanderlyn's recommendations—Original drawings—Chance meeting with Mrs. Pirrie, and engagement as tutor at "Oakley"—Enchantments of West Feliciana—"My lovely Miss Pirrie"—The jealous doctor—Famous drawing of the rattlesnake—Leaves St. Francisville and is adrift again in New Orleans—Obtains pupils in drawing and is joined by his family—Impoverished, moves to Natchez, and Mrs. Audubon becomes a governess—Injuries to his drawings—The labors of years destroyed by rats—Teaching in Tennessee—Parting with Mason—First lessons in oils—Mrs. Audubon's school at "Beechwoods"—Painting tour fails—Stricken at Natchez—At the Percys' plantation—Walk to Louisville—Settles at Shippingport. Audubon's failure at Henderson was the crucial turning point in his career. For the five years that immediately followed he led a peripatetic existence in the southern and western states, seldom tarrying long at one point, often leaving his family for months at a time, living from hand to mouth, but ever bent on perfecting those products of his hand and brain, his life studies of American birds and plants.