Agnes Carr Johnston, born 30 June 1811 in Albemarle Co., Va - died 11 Sept. 1854 Russel Co., KY, was dau. of Thomas Buford Johnston and Sarah "Sallie" Ann Dawson.
Agnes Carr Johnston 1m. 1 May 1828 to Asa B. Chapman (1806-1828) by whom she had one dau. Sally Dawson Chapman (1838-1840).
Agnes 2m. before 1850 to Willis Wheat (1807-1863)

Willis Wheat is buried in Johnston family cem. near Johnston family home (aka the Col. Wm. Casey home on Edmonton Road (hwy 80) SW of Columbia, Adair Co., KY)

The 1850 census shows Agnes Johnston Chapman Wheat has her niece, Sarah Ann Johnston (d/o John Waller Johnston and Mary Claire Logan) living with her. Agnes Chapman's own dau. had died and her niece's mother had died and the father recently remarried.