The Morris L. Cohen Rare Book Collection consists principally of seventeenth- through nineteenth-century English and American legal sources, although volumes in French, German, and Spanish are also present. While modest in comparison to the rare book collections at other major law schools, it features a wide representation of early English treatises, generally regarded as the origins of the Anglo-American legal system. Two of the more important treatises included are Sir Edward Coke's Institutes of the Lawes of England (published in 1628-1644 in four parts) and Sir William Blackstone's Commentaries on the Laws of England (published 1765-1769 in four volumes).