Where Did Grace and Henry Go

In 1779 at Totnes in Devon, by special licence, Grace ROWSE married Henry BEEDLE at the church of Saint Mary's in the High Street, and I have never found a trace of them from that day forward.

The Devon County Records Office has quite a large collection of special licences, but naturally they don't have that one! (See rules of genealogy!)

In those days the marriage register did not record ages, or father's names, which doesn't help.

So what became of them, and where did they go? Someone must have them on a tree somewhere, surely??