1871 (everyone b. Woolwich unless otherwise stated).
RG10/732 33/59
17 Nelson Street, Woolwich
Joseph Mendez, tailor, 56, b. London
Sarah, wife, 48, b. London
Jacob, son, 18, b. London
Charlotte, dau, 14, b. London
Abraham, son, 9
Samuel, son, 7
Rachel, dau, 3
Joseph, son, 15Mo
and then at RG10/732 32/58
15 Nelson Street, Woolwich
Peter Fish, 22, Tailor (one leg)
Rebecca Fish, wife, 25
Hannah Mendez, sister, 11
David Mendez, brother, 5
Solomon Mendez, brother, 3
(freebmd shows Peter Fish m. Rebecca "Mender" in 1870).
By 1881 Solomon Fish is shown as a son to Peter and Rebecca, possibly he was Rebecca's son, before her marriage to Peter. Jacob is married and living in Woolwich with his wife and daughter. Hannah possibly married Henry Major in 1880 and is with him in Plumstead in 1881.
An Old Bailey hits relating to Joseph, mentions daughter Rebecca (in 1865):
http://www.oldbaileyonline.org/browse.jsp?id=t18650410-name-599&div=t18650410-479#highlight