The U. Erwin Sibley papers contain 52 cublic feet in 94 legal-size boxes. This collection is separated into three series.
Series One is comprised of 82 boxes containing Personal Papers, which includes personal correspondence, personal literary files such as photographs, speeches, presentations, essays, poems, and other publications; US Department of Navy files; legal files that include client information; Baldwin County Court correspondence; and other case notes. This series contains personal correspondence with Sibley's close friend, Congressman Carl Vinson.
Series Two is comprised of four boxes contianing family correspondence between Erwin Sibley and other relatives, including sAlan B. Sibley Jr., Daniel Erwin Sibley, Frank C. Sibley, Horace Sibley, and Michael C. Sibley. Also in these boxes are correspondence with other parts of the family, including members of the Jennings Family, such as Catherine Jennings and Ewin Reeves Jennings; the Dempsey family, such as Harry Dempsey and Martha Dempsey; and other relatives, such as Robert Lee Bothwell and B. King Couper. The family correspondence spans from 1918 to 1979 with the bulk of the material between the 1950s and the 1970s.
Series Three is comprised of eight boxes that contain Sibley's personal portfolio. The first two boxes contain farm files that include documents such as Piedmont Soil and Water Conservation District files, receipts, rental property agreements, leases, First Federal Savings and Loan files, U.S. Departmenet of Agriculture A.C.S.C. handbooks and forms, cooperative extension service files, Georgia Forestry Association newsletters and various other legal files. The rest of the collection contains tax documents, wage statements, Trust Company of Georgia legal papers, U.S. Veterans Administration files, insurance forms, interest vouchers, Lake SInclair Investment Corporation files, Lumpkin County property papers, Nu-Wa Company files, and related documents. The personal papers span from 1932-1978, with the bulk of the material from the 1950s and 1960s.