Does anybody know anything about the marriage (or background) of William Cowin and Rebecca Morrow, my great-grandparents. William was born on the IOM around 1889 and Rebecca probably near Lancaster in 1895. They had one son, Robert Archibald Cowin, born in 1915, but after this the marriage seems to have ended very abruptly and William was completely ostracised by the rest of the family (my mother was told he was dead). He actually died around 1971, and she around 1984.
Any help/clues very gratefully received.