Hope this helps... If John died in 1884 age 44 guess his dob would be c1840.

Births Mar 1840
Basset John Kingsbridge 9 4157 (inc Aveton Gifford)

Nearest for Elizabeth Chusley (mother)...
Elizabeth Emily Widdicombe Chudley
Chr: 01 Jun 1823 SAINT SAVIOR,DARTMOUTH,DEVON (nr Aveton Gifford)
Fa: William Chudley/Mo: Elizabeth

1841 census: Aveton Gifford - BASSET John M 01y Y Village

1851 Census: Court Barton, Aveton Gifford, Kingsbridge, Devon
Nathaniel PEARCE Head M 61 M Farmer Of 330 A Employing 10 Lab Outdoors Stokenham-Devon
Margaret N. PEARCE Wife M 60 F Holwell-Devon
Susan G. PEARCE Daur U 35 F Ashprington-Devon
Mary CORNISH Daur M 26 F Stokeinteignhead-Devon
Edward R. CORNISH SonL M 24 M Bishopsteignton-Devon
James PEARCE Son U 24 M Stokeinteignhead-Devon
John T. PEARCE GSon 7 M Scholar Aveton Gifford-Devon
John A. CORNISH GSon - 8 M --- Aveton Gifford-Devon
Elizabeth HUTCHINGS Serv U 23 F House Servant East Allington-Devon
Jemima GOODMAN Serv U 14 F House Servant Bigbury-Devon
William BEVELL Serv 12 M Farm Labourer Aveton Gifford-Devon
John BASSETT Serv 11 M Farm Labourer Aveton Gifford-Devon

http://genuki.cs.ncl.ac.uk/DEV/AvetonGifford/
(inc OPC, Chris Burgoyne for help, lookups, etc) - Good luck.