From the unpublished manuscript, Indian Atrocities Along the Clinch, Powell and Holston Rivers, page 23.
In a letter written by Captain William Russell to Colonel Preston, on September 21, 1776 (1) he states:
The Indians have killed a son, and a Negro of Jonathan Jennings, at Blackmore’s (Fort) since I last wrote you.
This killing took place sometime between July 7th and September 21, 1776, and the writer has been unable to recover the name of the Jennings boy or the Slave who were killed.
Johnathan Jennings left Ft. Blackmore in 1779, with Captain John Blackmore’s party when they rafted to the Cumberland settlement at Nashboro (now Nashville). While enroute his boat was attacked by Indians after it became fouled on a rock and another son and Negro slave were killed at this time. (2) After settlement at Nashboro, Johnathan Jennings was himself, killed by the Indians on the Cumberland River above the settlement at Nashboro.
(1) Draper Mss 4 QQ 73.
(2) Journal of Capt. John Donaldson, whose rafting party went out from the Holston and later joined up with the Blackmore party from the Clinch.