When John Henry "Doc" Holliday was a young man, he and his 1st cousin Mattie Holliday were best of friends. During their teen years the friendship turned to a romance, but family members pressured them to end their involvement. Some folks say it was their tragic love affair that sent him West and her into a convent. Mattie Holliday, was a second cousin to Margaret Mitchell . It is believed that Doc was the model for the always melancholy Ashley Wilkes.