Thanks for the information about Clyde and Mabel. That is helpful to me. Unless you object, I'll add a link to your page to my notes for Mabel.
I'm afraid I don't know any descendants of Mabel's family. I pretty much stop my research at 1900-ish, so Mabel and her siblings are the last generation I have on that line. I just checked my emails, and it looks like no descendant of that family has written me either.
I did find another Mabel Rigsby born in 1895. She was in Tennessee, though, so not likely to be yours.