It would seem that George lived to the ripe old age of 90.
George bought 405 acres of land in the Beverly Patent for 11.1 pounds, on 24 July 1740. A James Caldwell bought 600 acres for 18 pounds. source: Tinkling Spring, Headwater of Freedom, p. 418.
A book on Virginia Colonial Militia indicates that Company #4 of the Augusta County Militia was headed by John Christian, capt. and Wm Christian, Lt. In that company were listed Geo Caldwell, Wm Caldwell, Jas Caldwell. In company #5 there was a Robert Caldwell. source: Virginia Colonial Militia 1651 -1776 ed. W.A. Crozier, pub. The Genealogical Association, NY 1905.
Court Records of Augusta County 1745-1800:
August 20, 1746 - William Thompson to be overseer from Court Ho. to Tinkling Spring, already viewed, with these tithables John Lynn and his three sons, John Henderson, John Ramsey, John Preston, Wm. Palmer, David Stuart, James Coile, Joseph McClelhill, Alexr. Thompson, John Mitchell, John Hutchison, Andrew Russell, Geo. Caldwell and his two sons. - Augusta County Court Records, Order Book 1, Page 73
September 16, 1747 - Road from the Cross Road below Hays on No. Side So. River to the ridge be cleared, and Thos. Stuart and Wm. Christian be overseers. George Caldwell and his son to be added to the tithables. - Augusta County Court Records, Order Book 1, Page 288
October 25, 1755 - Propositions and grievances: John Hunter for services, wagoning; James Alexander, for patrolling; Wm. Wilson, Wm. Cunningham, Domnick Barrel, Mathew Thompson, John Atkins, Saml. Black, patrolling; John Brown for victualling men patrolling under Cap. David Lewis; Wm. Thompson for patrolling and going on an express; George Caldwell, for patrolling; Robert Poage, for waggoning; Israel Christian, patrolling; Israel Christian, claim of David Moore for provisions provided Cap. David Lewis's Co. of Rangers which provisions were received by Christian. - Augusta County Court Records, Order Book 4, Page 490
February 18, 1763 - Andrew Russell, with two tithables, William Palmer, William Martin, Alexr. McDonald, Wm. Thompson, Alexr. Thompson, John Thompson, George Caldwell and his two sons. Wm. Henderson and John Wallace, to work the road from Christian's Creek to Rockfeil Gap. - Augusta County Court Records, Order Book 7, Page 477
George Caldwell, William Caldwell, and James Caldwell were members of Company #4 of the Augusta County Militia.
"Caldwell" compiled by Mrs. John Q. Anderson, dated December, 1959, p. 25 states "George Caldwell, b. 1689 m. Jane Phillips and came to America."