Chiefly business and personal correspondence, financial records, and notes, of Baker, including letters from his father, Lorenzo Dow Baker, Sr. (1840-1908), ship captain, of Wellfleet, and founder of Boston Fruit Company which was involved in the Jamaican-American banana trade and his mother, Martha Miriam (Hopkins) Baker, detailing life in Jamaica and Wellfleet in the late 19th century; business correspondence of officials of the Boston Fruit Company such as J.H. Freeman, A.W. Preston, and Isaiah Young; and personal correspondence relating to charitable and recreational activities of the Baker family, including references to Jamaican plantation owners, social life on the island, and membership in Saint Thomas Rifle and Bath Tennis clubs.