Greg, James Dickinson may have been a nephew of Isaac Dickinson and Martha Rogers Dickinson. See below:
From History of Haywood County, Tennessee:
"When Isaac Shelby and Andrew Jackson signed the Chickasaw purchase in 1818, they opened up a wide fertile plain to white settlement. During the next three decades, immigrants poured into that area from all the surrounding states. Among them was John J. Dickinson, a lad of almost ten years, who was traveling with a rather large company of related families looking for greener pastures in the "Chicasaw Lands."
"During that long and difficult winter journey from their former home near what is now Selma, Alabama, John J.'s father, Isaac Dickinson, developed pneumonia and died in late January or early February of 1830 in the approximate area of Shelby County, AL. According to word-of-mouth family stories, a newphew, James Dickinson, took the body to be buried in Wayne County, NC, where Isaac had been born, the son of David and Ann Hood Dickinson. With embalming not common practice the, we'll assume it was a very cold winter."
"John J.'s mother, Martha Rogers Dickinson, with her eight children, ages 3 to 20, continued their journey with the rest of the group. She bought land along the Big Hatchie, where she reared and educated her children and lived until her death in 1842. Of her eight children, only John J. remained permanently in Haywood County. William and Nancy Elizabeth (m. Foreman) died young. Sarah (m. Wm Daniel), Rufus Wylie, Edwin Leroy, Martha Ann (m. D. C. Hall), and Eliza Jane (m. J. Z. Bunn), all moved further west to Dallas County, Arkansas, settling in the Tulip and Malvern communities." Jean Guice