Hi
I took a look at the BT's for Brentor and the parish records after and it looks to me as though the Spry family didn't come from Brentor.
There are no brothers or sisters for Richard getting married in the parish about the same time and they get married by licence.
Do they come from elsewhere ? Could finding a copy of that licence help.Certainly Joan comes from Lamerton bapt 4.3.1698 d of George.
Looking at possible burials in the parish for Richard's parents we find Richard ,his wives and children plus this
Francis Spry buried 18.4.1720.
It seems Francis was from Whitchurch
Francis Spry son of Richard Spry of Anderton married Dorothy Snell d of Thomas Snell of Stokeclemsland at Whitchuch 3 Aug 1703.
They had 4 children
Richard 8.9.1704
John 81./21.1.1705
Francis a son buried 21.2.1705
Johan 15.12.1706 a daughter
Dorothy wife of Francis buried 17 Dec 1706
Possible sister Johan Spry married Tristram Venton at Whitchuch by licence 26.10.1726.
There were 2 Richard Spry's born at Whitchuch 1703 and 1704 but only one marries there.What happened to the other?
Francis s of Richard Spry bapt 6.5.1672 at Whitchurch
Siblings William 23.2.1675 ,Mary 17.9.1681 and possibly Joan at Tavistock 14.2.1670.
Richard of Anderton buried 15.11.1699 and Ellenor widow of Richard 2.8.1713
Dorothy probably 5.8.1673 d of Thomas and Jone at St Neots who may then have moved to Stoke Climsland for final children until the youngest daughter Margery 15.4.1690 sometime between 1680 -3.
https://www.cornwall-opc-database.org/search-database/baptisms/?year_from=1643&year_to=1720&forename1=thomas&multiname=1&surname1=snell&bf=SearchRichard did have a Francis and Dorothy with his second wife Mary.
Just a coincidence?
Could be worth looking into.I'd start by looking for that marriage licenece.
Ciderdrinker