Family Search says that Hartwell Bass Greene, son of James Green and Elizabeth Bass, was born about 1768 in Sparta, Hancock County, GA.

http://www.kudzufamilies.org/green.htm says he was born about 1800 in Hancock County, GA.

In 1823 he was living in Morgan County, GA. Source: Morgan County, GA 1823 Tax Digest Index

In 1830 he was living in Upson County, GA. Source: 1830 U.S. Census, Upson County, GA, page 190.

Lula Greene Black (in an article to The Atlanta Constitution dated 7 Apr 1901) indicates his children are William, Robert, Elizabeth, Alex, John, Lucinda, Mollie, Charles and Billie.

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Alabama Land Records
---GREEN, HARTWELL B
Land Office: TALLAPOOSA DIST Sequence #:
Document Number: 917 Total Acres: 321.08
Misc. Doc. Nr.: Signature: Yes
Canceled Document: No Issue Date: May 14, 1840
Mineral Rights Reserved: No Metes and Bounds: No
Survey Date: Statutory Reference: 24 Stat. 388
Multiple Warantee Names: No Act or Treaty: February 8, 1887
Multiple Patentee Names: No Entry Classification: Indian Allotment General
---GREEN, HARTWELL B
Land Office: TALLAPOOSA DIST Sequence #:
Document Number: 91 Total Acres: 320.08
Misc. Doc. Nr.: Signature: Yes
Canceled Document: No Issue Date: May 14, 1840
Mineral Rights Reserved: No Metes and Bounds: No
Survey Date: Statutory Reference: 24 Stat. 388
Multiple Warantee Names: No Act or Treaty: February 8, 1887
Multiple Patentee Names: No Entry Classification: Indian Allotment General