Charles Mason (Oakridge Lynch, near Stroud, Gloucestershire, April 1728 – Philadelphia, October 25, 1786) was an English astronomer who made significant contributions to 18th-century science and American history, particularly through his involvement with the survey of the Mason-Dixon line, which came to mark the border between Maryland and Pennsylvania (1764–1768).

• http://en.wikipedia.org/wiki/Charles Mason
• Charles Mason on www.findagrave.com