B. Lectures, 1786-1836, undated., 1786-1836

Consists of handwritten notes by Waterhouse for lectures he delivered while he was a professor of medicine and natural history at Harvard, as well as lectures to the public. Topics of his lectures ranged from the history of medicine and medical care to specific branches of medicine like anatomy and physiology, and diseases including smallpox and rheumatism. Waterhouse also lectured on chemistry, mineralogy, botany, etymology, geology, and Earth's creation. He frequently referenced historical theories of medicine and natural history, particularly those of Hippocrates and Galen, as well as theories of more contemporary physicians including Herman Boerhaave, William Cullen, Joseph Priestley, and John Brown. Waterhouse's lectures on botany focused on the Linnaean system of plant classification. Waterhouse reused his lecture notes, and in some cases it is indicated when he repeated certain lectures, and if changes were made to the content. There are also notes taken by an attendee of his lectures on the theory and practice of physic, most likely a Harvard student.