 It is believed that Pinkerton came up with the slogan to his agency "we never sleep" as a result of Warne's guard of Lincoln that night.Warne was key in the foiled Baltimore assassination plot – not only did she help uncover its details, but she also carried out most of the arrangements to smuggle Lincoln into Washington, D.C. She couriered secret information and set up meetings as well as securing the necessary four berths on a train leaving Philadelphia under the pretext that these berths were for her sick brother and family members.The train pulled out shortly before 11 p.m. and arrived in Baltimore about 3