I found William and Sophia on the 1850 TX census, but can't find them after that. Do you know where they were? Is Mary Morris b. 1849/1850 your ancestor?
1850 Guadalupe Co., TX 142 William Morrism 24 b. ca 1826 Missouri Sophia Morrisf 30 b. ca 1820 Germany Mary Morrisf 7/12 b. ca 1850 Texas*** William Show (or Shorn)m11 b. ca 1839Germany Albert Show (or Shorn)m 2b. ca 1848 Germany