Civil War Spies Jaden Henry and Zach Archie By henryjm Sep 30, 1819 Thomas Jordan Birth Period: Jan 1, 1833 to Jan 28, 1868 Kate Warne was the first female detective in the United States. May 9, 1844 Belle Boyd Jan 1, 1861 Rose O'Neal Greenhow birth Jan 1, 1861 William Alvin Lloyd was hired as a personal spy for Abraham Lincoln Period: Jan 1, 1861 to Jan 1, 1862 Pinkerton served as the head of the agency Jul 1, 1861 Greenhow sent a coded message to Jordan about a planned federal invasion Period: Sep 12, 1862 to Nov 7, 1864 Baker took control of the agency Jan 1, 1863 William Alvin Lloyd was hired as a personal spy for Abraham Lincoln Jan 1, 1865 at the end of the war there were no more Confederate spies but Union spies remained