The Frick Collection is an elegant museum housed in Henry Clay Frick's former mansion at 1 East 70th Street in New York City. The collection of works from the Renaissance through the late nineteenth century is housed in the former residence of Frick, the Pittsburgh coke and steel industrialist. The building, erected in 1913-1914, was designed by the American architect Thomas Hastings in a style reminiscent of European domestic architecture of the eighteenth century. Griswold was involved in the 1975 revitalization of the European traditional style garden to coincide with the architecture of the house. Included in this subseries are two planting plans for the garden and two site plans of the house. Additional files relating to this project may be found in Series V.