Architectural and landscape plans for the Darwin D. Martin House Complex, designed by Frank Lloyd Wright, in Buffalo, New York, including blueprints and drawings showing the original plans for the house, outer buildings, gardener's cottage, furniture and landscape architecture, as well as plans for subsequent alterations; also plans for the Martin Family Country House, Graycliff, built on the Lake Shore of Lake Erie at Derby, New York. Also included (item 35) is a letter book, 1905-1906, concerning the Martin House kept by general contractor, O.S. Lang.