I don't know if you have an answer to your question regarding Sarah C. (Langton) Bartmess as yet.
This is what I have:
Sarah (Sally) Coles Langdon, dau. of Samuel Langdon, b. 20 Aug 1820. m Peter Bartmess 2 Nov. 1842. She d. 1 Dec 1853. Peter d. 9 Feb. 1857.
Children: Amelia Bartmess, b. 8 Aug. 1843, m. L. F. Self, 1890 Mary Bartmess, b. 10 Jan. 1845, m. S. F. Waters, 25 Sep. 1866. John Langdon Bartmess, b. 23 Jul. 1848. Samuel Thomas Bartmess, b.5 Apr 1850, m. Splicer. Helen Bartmess, b. 28 Oct 1846 Martha Bartmess, b. 21 Dec 1851, m. Chas. Bruce. Henry Bartmess, b. 1853, d. 1853.
Samuel Langdon was son of Daniel Langdon. Samuel was b. 6 Dec 1790, and moved to KY with is father in 1842.
This information was taken from Langdon Family Genealogy written by Dr. Samuel Thomas Langdon, 1896-1906.