Walter Sutherland and Elizabeth/Elspet Gunn

Hi
Am new to the forum and am trying to trace the births of
Walter Sutherland c1770 and Elspet/Elizabeth Gunn c1778. They married in Latheron in 1804. At the time she was resident in Ousdale ( called Ausdale in the register) and he lived in Rinsary (Rhinsary).
They later left the area and moved to Edinburgh where she is referred to as Elizabeth but same birthdate and place ie: Latheron.
Can see lots of Sutherland's and Gun(n)s but very few Walter's and Elspet's/Elizabeth's and don't know enough to pin them down.
Has anyone else come across this pair in their research?

Thanks
Bunbury