my sources are the LDS website ancestry.com, a history of Grimes County, and a typewritten page of genealogy that some member of the Stampley's made at some point...
Richard and Abigail's son David married Sarah Flower (or possibly Flowers). Their son William Smith Stampley came to Bedias, Grimes Cty, Texas in 1876/7 from Yazoo Cty. MS and married Roxanna Jane McKeown (one source calls her Jennie).Family info says he clerked in the Stampley and Nichols General Store in Bedias, so some of his kin must have been in Bedias before he came.His son William Earl is the grandfather of my wife.We don't know William Earl's wife's name, but she died in 1923 or 1924.
Date for Abigail Smith's birth either 1800 or 1801, both sources show Oct 12th.
Children I have listed for Richard and Abigail are: Thadius b 25 Jun 1828 David b 24 Jun 1829 Sarah b 11 Oct 1830 Jessie Smith b 10 Jun 1832 John b 25 Jan 1833 Jefferson b 16 Apr 1834 Martha Malvina b 25 Jan 1838 Richard, Jr. b 31 Jan 1839 Leonidas b 13 Feb 1841
I have more info, including some death dates and locations.
I also have information on David's descendants if you are interested.