Hi, I'm not sure how closely the time frame has been set for the arrival of Isaac and family in Texas but Mary Jane Riddle, daughter of Thomas (son of Isaac) was born Feb. 25, 1850 in Titus Co. TX. She gave this birthdate on a pension application. Her sister Martha was born in Kentucky in 1846. (according to census records) I have the actual date for Martha as August 11, 1846. Regards, G-Nell