1871 Census
Rame, Wendron, Cornwall
RG10/2300/69/16
Clarinda DUNSTAN, head, mar, 25, stone masons wife, born Wendon
JOHN.W., son, 7, scholar
Eliza.J, 6, daug
Roletta , son, 4
Ellen, daug, 3
Caroline.E, daug, 2
All born Wendron
Next door, James OPIE, 58, stone mason and wife Phillipa Opie, 56, born Wendron/Mabe
Marriage;
John DUNSTONE
June 1863
Helston 5c 317
On same page Clarinda OPIE

1881 if you dont have census access you can search for yourself on Familysearch, Clarinda Dunstan, 1846, Wendron
1891 Clarinda is still alone, a Widow. Roleta and Caroline are still at home. Good sign as John W. if he is yours is married by now.

RG12/1839/88/5
Possible Death;
John Keam DUNSTAN
June 1886
Redruth 5c 192
Age 41
Ok 41yrs in 1886, born c 1845, dies after John and Eliza marry, so would be listed as living on Marriage Cert. Dies before Clarinda is listed as Widow in 1891 census.
Maybe he never appears with Clarinda as he away working all the time . He seems to be around enough to father several children though

I will try to find him alone later. he could be under Dunstan/Dunstone/Dunston etc so make take time.
There is a possible birth for John jnr 1863;
John William DUNSTAN
September 1863
Helston 5c 228
Or he could be reg. just under John
Cheers,
Trish