Correspondence, subject files, corporate committee files, corporate reports, yearly appointment calendars, biographical materials, photographs, books from his personal library, memorabilia and works of art. Correspondence includes 3 bound slipcased volumes containing 471 letters, notes and congratulatory telegrams on the occasion of R.D. Lilley being named President of AT&T, April 1, 1972. Correspondents include David Rockefeller and Peter W. Rodino, Jr. Subject files contain Columbia University activities. Manuscript files include his student notebooks from the School of Engineering (1931) and the School of Mines (1934-1935). Corporate committee files include the New Jersey Commission on Civil Disorders, 1967-1968. Memorabilia consists of seven Columbia University related plaques, awards, citations, and varsity letters and fifteen Columbia related commemorative gifts and tokens, as well as thirty-five non-Columbia related diplomas, plaques, awards, citations and certificates and fifty-five non Columbia related trophies, commemorative gifts, and presentation pen & pencil sets. The works of art include two views of the Park Place building "Columbia College New-York" (NEW YORK MIRROR, 1828) and "Columbia College and College Green" (New York, 1830) facsimile reprint of the "Palm tree print"; a print of a drawing of "Columbia University circa 1903" from the Avery Library; two signed prints of Ernest D. Roth "Hamilton Hall" and the "School of Mines"; and a relief print of "John Jay" by Stanley Wyatt.