1871
Octavius and Elizabeth are living with 2 grandchildren
John Hewitt Grandson 18 Ag Lab
Ada York Granddaughter 13 Scholar b St Sepulchre
Got that wrong Ada is a Son - presumed because of name oops 
Lucy is living with her son John his wife Mary M and Thomas listed as Brother (of John). Lucy is listed as a widow. Cannot find a burial for William and there are 4 deaths registered that could fit on Free BMD.
William and Patience are there with Alfred 14, Sarah A 12, Enoch 10, Rebecca 10 granddaughter (Patience had a name change I think) Elzah 6 and job 2.
Lucy was buried 18 June 1872 so we wont find her in any more censuses.
Octavius was buried 22 Oct 1879 and Elizabeth was buried 26 March 1880.
John Hewitt married Elizabeth Dunkley on 21 Oct 1877. John Hewitts father is listed as John.
1881
William and Patience are there with Job 12 and Albert 9
John Hewitt and Elizabeth are there. John is a carpenter. 3 children Ellen 3, Esher 1, and Elizabeth 5 months.
I hope Octavius and Elizabeth were well enough in their last years to enjoy eithr great grand daughter

Ted