In the 1910 Tippah Census, there is a Clark, Dan L. 30 & Wife Lucy 24. Dolly Daufg 4 & Albert Son 2 Twins Luther & Lula 9 months. also Mercer, John T. 41 & Mattie 48 Jessie Son 18 & Faunie Son 12. Your marriage date doesn't jive with Lucys age, tho. Joe Mercer