in land-speculation and was charged with forgery in 1810, possibly as a result of securing a loan using property that was already mortgaged. He was found guilty and spent nearly five years in Newgate Prison, the state penitentiary at Greenwich Village. While in prison he formed a friendship with a young John Torrey, whose father was a city alderman and fiscal agent for the prison. Torrey would bring Eaton books while Eaton in turn would tutor his protege in the basics of botany. In 1815 he was released with a pardon from Daniel D. Tompkins, the governor of New York. On his release in 1815, Eaton moved to New Haven at Yale College to take up the study of botany, chemistry and mineralogy under the tuition of Benjamin Silliman and Eli Ives. He then returned to Williams College to offer a course of lectures and volunteer classes of the students on botany, mineralogy zoology, and geology and published a botanical dictionary. In 1817, he published his Manual of Botany for the Northern States, the first comprehensive flora of the area; it ultimately went through eight editions. From Williams College the lectures were extended, in the shape of courses, with practical instructions to classes, to the larger towns of New England and New York. He returned to New York in 1818 following Governor DeWitt Clinton's invitation for him to deliver a series of lectures on the state's geology to the New York State Legislature in connection with the building of the Erie Canal. Among the legislators who heard these lectures was Stephen Van Rensselaer III, who hired him to produce A Geological Survey of the County of Albany, which was followed by geological surveys of much of the area through which the canal was built. Ultimately, Eaton completed a survey fifty miles wide from Buffalo to Boston. Eaton delivered talks at the Lenox Academy and the Medical College at Castleton, Vermont, where he was appointed professor of natural history in 1820. He gave lectures and practical instructions in Troy, laying the foundation of the Lyceum of Natural History. In 1820 and 1821, Eaton initiated geological and agricultural surveys of Albany and Rensselaer counties, which were financed by Van Rensselaer. Rensselaer School After co-founding the Rensselaer School in 1824, Van Rensselaer appointed Eaton to teach chemistry, experimental philosophy, geology, surveying, and the "laws regulating town officers and jurors." By then Eaton was