 Spencer ran the agency until his retirement in 1968 when he sold it to an investment company.The agency was instrumental in establishing the reputations of several British and American writers, including John Steinbeck, William Faulkner, Norman Mailer, C P Snow, Angus Wilson, Lawrence Durrell, Gerald Durrell, Kingsley Amis, Elizabeth Bowen, and Isaiah Berlin.In 1953 Spencer Curtis Brown Black head hunted Kitty Black and she became chief play reader at "Curtis Brown".