My last thought for the night is is this. As witnesses to the 1813 marriage of Mary were Samuel Perry and Fanny Perry, I am thinking was Samuel possibly Marys brother?. I say this because the previous year in Hockworthy was a marriage of Samuel Perry to a Frances (possibly known as Fanny maybe?)
First name(s) Samuel
Last name Perry
Marriage year 1812
Marriage date 16 Apr 1812
Parish Hockworthy
Place Hockworthy
Spouse's first name(s) Frances
Spouse's last name Frost
Denomination Anglican
County Devon
Archive South West Heritage Trust
I suppose we could make anything fit what we are searching for but its something worth checking out.
Here is what maybe samuels baptism
First name(s) Samuel
Last name Perry
Birth year -
Baptism year 1780
Baptism date 16 Apr 1780
Denomination Anglican
Baptism place Hockworthy
Father's first name(s) William
Mother's first name(s) Mary
County Devon
Archive South West Heritage Trust