Note A7-33 — APPENDIX VII A Brief History of Presidential Protection
Reading edition
“Hearings Before the Subcommittee of House Committee on Appropriations in Charge of Sundry Civil Appropriations Bill for 1911,” 61st Cong., 2d sess. at 176 (1910); Records of U.S. Secret Service, Record Group 87, Daily Reports of Agents on White House detail, 1902-36, National Archives; W. S. Bowen and H. E. Neal, “The United States Secret Service” 11, 126 (1960).