This trip was undertaken mainly in the interests of the "Quadrupeds and Biography of American Quadrupeds," and much of what he saw and did is woven into those three volumes. The trip lasted eight months, and the hardships and exposures seriously affected Audubon's health. He returned home in October, 1843. He was now sixty-four or five years of age, and the infirmities of his years began to steal upon him. The first volume of his "Quadrupeds" was published about two years later, and this was practically his last work. The second and third volumes were mainly the work of his sons, John and Victor. The "Quadrupeds" does not take rank with his "Birds." It was not his first love. It was more an after thought to fill up his time. Neither the drawing nor the colouring of the animals, largely the work of his son John, approaches those of the birds. "Surely no man ever had better helpers" says his grand-daughter, and a study of his life brings us to the same conclusion--his devoted wife, his able and willing sons, were his closest helpers, nor do we lose sight of the assistance of the scientific and indefatigable MacGillivray, and the untiring and congenial co-worker, Dr. Bachman. Audubon's last years were peaceful and happy, and were passed at his home on the Hudson, amid his children and grandchildren, surrounded by the scenes that he loved. After his eyesight began to fail him, his devoted wife read to him, she walked with him, and toward the last she fed him. "Bread and milk were his breakfast and supper, and at noon he ate a little fish or game, never having eaten animal food if he could avoid it." One visiting at the home of our naturalist during his last days speaks of the tender way in which he said to his wife: "Well, sweetheart, always busy. Come sit thee down a few minutes and rest." Parke Godwin visited Audubon in 1846, and gives this account of his visit: "The house was simple and unpretentious in its architecture, and beautifully embowered amid elms and oaks. Several graceful fawns, and a noble elk, were stalking in the shade of the trees, apparently unconscious of the presence of a few dogs, and not caring for the numerous turkeys, geese, and other domestic animals that gabbled and screamed around them. Nor did my own approach startle the wild, beautiful creatures, that seemed as docile as any of their tame companions.