In 1850 Allan Pinkerton founded the first American private detective agency; in advertisements, the company motto, "We Never Sleep" was inscribed under a large, unblinking Masonic-like eye, which gave rise to the term "private eye".... William J. Burns was an avid user of a Dictograph- a primitive listening device that could be concealed in anything from a clock to a chandelier.... Just as Allan Pinkerton, in the nineteenth century was known as the eye, Burns, In the twentieth century had become "the ear".
( David Grann )
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