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An Oct. 3, 1862, photo shows, from left, Allan Pinkerton, President Abraham Lincoln and Maj. Gen. John A. McClernand in Sharpsburg, Md., after the Battle of Antietam ...

The 16th president lived in an era that witnessed great technical innovation and the commercial expansion of photography Scholars estimate that Lincoln sat for 33 photographers and 127 portraits in ...

Scottish emigrant and abolitionist Allan Pinkerton founded America's first detective agency and successfully brought down some of the country's most ruthless criminals. But in 1874 he tried to take on ...

Based on the historical private security guard and detective agency established in the U.S. by Scotsman Allan Pinkerton in 1850. Pinkerton became famous by claiming that he had thwarted a plot to ...