Wendy, The sources are of course the names compiled by David P Mason whom you listed. Are there others, perhaps, but none that I know of. Thomas Adcock and family are listed in the Baldwin county, Miss territory 1810 census. The Adcock surname is listed by Mason as either there at Fort Mims or having relatives at Fort Mims. Thomas Adcock does not appear in any other tax list, census list or deed records in Monroe or Baldwin County, Alabama after August 30, 1813. John Adcock, his oldest son, made claims of losses suffered in the Creek Indian war of 1813-1814 in Judge Harry Toulmin's court in Oct 26, 1815: 5 head of horses @ 50 dollars each 20 head of cattle @ 6 dollars each 35 head of Hogs @ 4 dollars each
What I am getting at is that if Thomas Adcock had survived, why did he not make claims against the Creek Indians like his son. I would have to go back to Mason's book and look at his sources and verify them. However, to me it looks pretty obvious Thomas and his wife were killed at Fort Mims. His daughters, Sarah and Elizabeth, married Capt Thomas H Boyles and Sgt George Stiggins, respectively. Lewis Adcock most likely was killed in the Creek indian War as he along with his brother John and Reuben were all in the company of Sgt George Stiggins and Capt Thomas Boyles. Nothing ever shows of Lewis Adcock after joining and his 2 brothers both applied for war of 1812 pensions.
I have seen several people who list Thomas Adcock's wife's name as Elizabeth. Don't know where they get that from. I have never found any deeds, marriage records, wills or anything else that mentions her name, and I have deeds of Thomas Adcock as far back as 1784 in Columbia, Washington, Lincoln, and Hancock counties in Georgia. Some have his brother James and his wife Elizabeth Adcock, but never any mention of Thomas Adcock's wife.