1851 census:
Reference HO107, Piece 1944, Folio 538, Page 25
Newton St Loe, Somerset
Collins, James Head M 25 Miller Employing 5 men b Twerton, Somerset
Collins, Caroline Wife F 28 b Swainswick
+ housemaid & mill labourer
And there are some possibilities re deaths:
1855 at Twerton, James Collins, age 28
1858 at Newton Keynsham, Caroline Collins, age 36
(Found on BathBMD)