William Augustus Leggo (25 January 1830 at the City of Quebec – 21 July 1915 at Lachute, Quebec) was a Canadian inventor, engraver and businessperson. He is noted for co-inventing the half-tone engraver with George-Édouard Desbarats. He had several patents to his name, including leggotyping and granulated photography.
Desbarats and Leggo founded the New York Daily Graphic in 1873, the first daily illustrated paper. While it was a pioneering effort, it was not a financial success, and Desbarats eventually returned to Montreal, leaving Leggo in New York.
- Black, Harry. Canadian Scientists and Inventors: Biographies of People who Shaped Our World, p. 57 (2d ed. 2008)
- "William Augustus Leggo". Library and Archives of Canada. Retrieved 2007-09-17.
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