When legendary detective Allan Pinkerton got wind of the plot, he advised Lincoln to remain hidden for the remainder of the journey while he conducted an investigation. However, the case was never brought to trial, leading Lincoln to be ridiculed in the press for 'cowardice' - because of which, he vowed never to hide in public again. A promise which, four years later when he sat in full view in the balcony of Ford's Theatre, would cost him his life.
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The Pinkerton Agency was the first national detective agency, and worked for the Union side during the Civil War and primarily for business interests in later years. Baltimore, Maryland, was founded in 1729 and is named for Lord Baltimore, a British peer and proprietor of Maryland colony.