The Paul and Rachel Mellon Dealer Files contain records relating to the purchase of rare books and artwork, including prints, etchings, engravings, drawings, sculpture, and paintings, by the Paul Mellon family. The records comprise correspondence, records, images, and invoices between various dealers, Paul Mellon, and his assistants and art advisors. Many files include detailed provenance, biographical, and conservation information for the artworks, as well as photocopied exhibition catalogs. There are records pertaining to artwork found at the Yale Center for British Art, the National Gallery of Art, and the Virginia Museum of Fine Arts, among other institutions. The John Baskett invoices are records related to artworks purchased through John Baskett, Ltd., a dealership run by Paul Mellon's close friend and advisor, John Baskett from 1964-1990, from whom the Mellon's purchased many works of British art currently on display at the Yale Center for British Art.