You say when they were living in Houston Co, TX, but nothing on when they were born, their ages etc. So, do you know the names of any of their children? There is a James W. Howard on the 1910 census Houston Co, TX, with wife named Anna. But, on the 1920 & 1930 census her name is Maud. On his death certificate she signs her name as Maude[sic] Howard.
All together, names from census records are -- Lucile, Rosalie, Hazel, William, Ruthy Katherine, Helen, Clifford, Dorothy. Any look familiar?