Trying to find any information on the possible death of John W. Wellborn (b. 1859 in Georgia) in Mobile, Alabama between the 1900 census and the 1910 census. He worked for the railroad and in 1900 was living in Montgomery. In 1910, his widow, Sallie/Sarah Harpe Wellborn was living with her brother-in-law and sister in Mobile and employed as a seamstress. She is not with the family in 1920, and, as she was only 40 in 1910, may well have remarried.
I do not know that John died in Mobile, am also searching in Montgomery, but it is worth asking. I think it likely that Sallie remarried and that it is likely it was in Mobile.