Simon Greenleaf, 1783–1853, American legal writer, b. Newburyport, Mass. A member of the Maine bar, he won a high reputation for legal scholarship early in his career. With the admission (1820) of Maine as a state, he was elected to a term in the legislature and was appointed reporter of the Maine supreme court. In 1833 he resigned this position and accepted the invitation of Joseph Story to become a professor of law at Harvard. Much of the excellence of Harvard Law School is attributed to these two men. Greenleaf's Treatise on the Law of Evidence (3 vol., 1842–53) for many years was the standard American work on the subject. Another text used for many years was his revision (5 vol., 1849–50) of William Cruise's Digest of the Law of Real Property.