This collection of papers has been organized into 4 series. Series 1, Office Files, contains chronological correspondence files, 1921-79; project files containing correspondence, contracts, financial documents, notes, small-scale drawings, memoranda, and other materials, 1924-1990; and files on administrative matters, articles and talks on Palo Alto's architectural history, and other professional activities. Series 2 consists of photographs of finished projects (homes, schools, municipal buildings, and businesses), 1927-77. Series 3 contains specifications and some drawings and plans. Series 4, Personal Papers, includes files from architecture classes Clark taught at Stanford containing syllabi, exams, informational materials, lectures, and correspondence, 1950-72; files from Stanford's Class of 1914 fundraising efforts, 1977-79; copies of his two memoirs, 1971 and 1982; and other miscellaneous papers.