Colonel Robert Erskine (1735-1780) was the Geographer and Surveyor-General of the Continental Army during the American Revolution. Events 16 April - The London premiere of Alcina by George Frideric Handel, his first the first Italian opera for the Royal Opera House at Covent Garden. ... 1780 was a leap year starting on Saturday (see link for calendar). ... Before the Revolution: The 13 colonies are in red, the pink area was claimed by Great Britain after the French and Indian War, and the orange region was claimed by Spain. ...
Sources
Professional Surveyor Archives: Robert Erskine, Part I
Professional Surveyor Archives: Robert Erskine, Part II