Not trying to dampen your research but it'll prove very difficult. Best hope, start with Sam Moore born 1852? There is no census trace for him 1870-1880. The 1860 record you've selected does not apply. That family was probably Caucasian 'cause 1870 was first census to include newly freed slaves in Texas? Call Trinity County Clerk and request "lookup in marriage index for Sam Moore, 1870-1900". Be sure to specify "marriage index" 'cause that's quick and easy. Start with Sam and hopefully work in reverse. Those daughters were born 1894 and 1895 per 1900 census.