Hi Bill
Not sure if this is them but in the 1841 Wales census there is a James and Elizabeth living in Llangynider Brecon with the Griffiths family.

Name: James Vaughan
Age: 70
Estimated Birth Year: abt 1771
Gender: Male
Where born: Breconshire, Wales

Civil Parish: Llangynider
Hundred: Crickhowell
County/Island: Breconshire
Country: Wales

Street address: View Image
Occupation: View Image

Registration district: Crickhowell
Sub registration district: Llangunider
Neighbors: View others on page
Household Members: Name Name
Thos Griffiths 35
Elinor Griffiths 27
Mary Griffiths 4
John Griffiths 3
James Vaughan 70
Elizabeth Vaughan 71

Even though it says Where born:- Breconshire, the census form is so faint that I cannot read if they were born in Breconshire or not. I think not.

Dave