Hi Graham,
Unable to reply personally as only on second post.
John Jervis 1827 son also John Jervis 1855 married Harriet Ackerley and according to new info on 1911 census had 11 children 7 of which survived. 5 shown on census are William, Ada, Harold, Frances and Ellis living at Stamer St in Stoke on Trent.
No father for John Jervis 1827 yet. Still sorting out Joseph 1849 as John 1827 married Elizabeth Yates in 1854 - may be a nephew as often relatives were farmed out if they lost their own parents.
Regards
Terry