”T.D. Isom was a clerk in Craig's trading post before he went off to study medicine. T.D. Isom and JJ. Craig were more than business associates, they became brothers-in-law when Craig married Sara Gale Isom, T.D.'s sister. They also became stepbrothers when David Craig, Jr., a widower and John's father who also migrated to Lafayette County, married Mary Gale Isom, T. D.'s widowed mother. This John Craig's wife was also his stepsister.” Fred Craig