Joseph Hartshorne Bonsall (September 7, 1833 - April 9, 1876) was an American civil engineer and surveyor active in Philadelphia, Pennsylvania and later Denver, Colorado. Bonsall was born in Philadelphia, the son of Edward H. Bonsall (1794 - 1879), a well-respected citizen of that city and founder of the 'Philadelphia, Germantown and Norristown Railroad'. He worked the Philadelphia Survey Department, where along with Samuel Lightfoot Smedley (1832 - 1894), he prepared a large-scale map of Philadelphia. He relocated to Denver Colorado around 1869 where he worked as a surveyor with the Pacific Railroad. There, working with Edwin Hosmer Kellogg (1845 - 1927) he published several important maps of Colorado and Denver. Bonsall died of smallpox in 1876.

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