As much as I would like to think the letter that my Nannie wrote was historically accurate, the lack of historical evidence states otherwise.
I cannot find any proof that Thomas Donaldson fought at Kings Mountain. I have checked the roster of soldiers and his name is not on the list. I cannot find evidence that Thomas Donaldson had 2 other brothers. I am pretty sure he had one brother named William Donaldson. William Donaldson was listed in the 1787 tax list in Abbeville along with Thomas. William was also listed in the 1790 census of Abbeville with Thomas.
Thomas Donaldson could have been from the Wilmington area because there was a large Scot Irish settlement in the Cape Fear Region. I think Mary Cook may have been from Sampson County, NC . There is a Cornelius Cook who was in Sampson County, NC in 1790, but he disappears by 1800. A Cornelius Cook (a son?) then pops up in Laurens County in 1794 according to land records. Cornelius Cook was mentioned in Thomas Donaldson’s state record in 1811.