I am related through Harriet as well!! Leander & Harriet's daughter Hannah Ellis Grant is my 2nd g grandmother!
I can't find ANYTHING that shows a marriage or divorce of Charles and Martha Humber. Story I get over and over is that Charles and son Thomas Cole Humber went on a trip and Charles left his son and went on to Alabama to live with one of his brothers (John P Humber) then met wife #2
Which of the Ellis is your friend related to?