Leonard Marbury, 1749-1796, Georgia (Provincial Congress; Deputy Surveyor

Found: 

Article: To George Washington from Leonard Marbury, 21 April 1792

Leonard Marbury (1749 - 1796), Congressman (Georgia 2nd Provincial Congress, 1775).

Deputy Surveyor of St. Paul’s Parish, 1772.

Born in Maryland, United States.

http://founders.archives.gov/documents/Washington/05-10-02-0183

Website: Founders Online, National Archives
http://founders.archives.gov/documents/Washington/05-10-02-0183
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Mentioned on Duke University resource page (Revolutionary War era documents):

Leonard Marbury letter, 1779, in (collection), Samuel Elbert Papers, 1769-1788.
Subject: British defeat at Bryan Creek Bridge, Ga.

http://library.duke.edu/rubenstein/scriptorium/pathfinders/american-revolution/

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Some stuff here about headrights (land grants to encourage settlement): Franklin, Georgia, etc.
http://www.colonial-settlers-md-va.us/getperson.php?personID=I059573&tree=tree1

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Also found: Genealogy site: http://www.haywoodcountyline.com/marbury.html