Pinkerton (detective agency) significant person Kate Warne
Forerunners to the Secret Service
Among the business's early operations was to safely deliver the newly elected President of the United States Abraham Lincoln to Washington, D.C., in light of an assassination threat. Pinkerton detective Kate Warne was assigned and successfully delivered Lincoln to the U.S. capital city through a series of disguises and related tactics that required her to stay awake throughout the entire long journey. As a result of the public notoriety of this success, the business adopted an open eye as its logo and the slogan, "We never sleep." Allan Pinkerton around this time also served in the "Secret Service" intelligence division of what was then known as the U.S. War Department. 
These actions preceded and laid the groundwork for the establishment of the United States Secret Service, which is tasked with the serving and former U.S. Presidents' security to this day. The official Secret Service was founded on July 5, 1865, less than three months after the assassination of Abraham Lincoln.