1841, his address is dittoed under Garret Street, Cawsand
Still in Garrett Street 1871 & 1881 occ fisherman
William Oliver Age 66
Where
born Kingsland, DevonCivil parish Rame
Town Cawsand, Rame and Forder
County/Island Cornwall
1871
Piece 2228
Folio 91
Page number 23
Mary Ann Oliver 65 Wife Cawsand, Cornwall
Margrete Johns 30 Vis Dau
Elizabeth Roberts 14 Granddaughter
Emma Jane Thorn 4 Gran Daur Vis
William Oliver Age 75
Where born Maker, Devon
Civil parish Rame
Street Address Garrett Street
Marital Status Married
Occupation Fisherman
1881
Piece 2279
Folio 93
Page number 28
Mary Ann Oliver 75 Wife
Margaret Johns 40 Daughter
Wm. Oliver Johns 9 Grandson
Elizabeth Browing 23 Granddaughter
Earnest Browing 1 Great GrandSon
Which site are you using.
Here is Family Search - 1861
https://www.familysearch.org/ark:/61903/1:1:M74Y-Y34?lang=en
Edit to add 1861 census Garrett Street - apologies Heywood missed that you posted

Piece 1522
Folio 90
Page number 19
William Oliver 56 Head
Kingsand, Devon occ fisherman
Mary A Oliver 56 Wife Cawsand
Elen Oliver 23 Daughter
Margrate Oliver 20 Daughter
Jane Oliver 18 Daughter
William Oliver 25 Son Visitor
Eliza Oliver 24 Dau in law V
Elizabeth Roberts 4 Gd,V
Margrate Dunstone 58 Sister in law visitor