Yet more thanks for everyone's brilliant efforts. Judah Perkins - what a splendid name. I wonder what it was originally - possibly something like Pinchas?
In answer to Alan's question, I have Charles in the UK 1841 Census, aged 3, living in Spitalfields, London, with father Henry, 45; mother Elizabeth (hence the name of Charles' daughter?), 35; and siblings Rachel, 10; Hyam, 5; and Saul, 1.
I haven't been able as yet to find him in the 1851 Census, but in 1861 he was living at 8, Frying Pan Alley, Spitalfields, aged 25, with wife Ellen, 26 (born Bristol), two children, born in Lambeth, south London - Elizabeth, 3, and Henry, 1 and, strangely, a Sophia Myers, 16, also born Lambeth but described as Servant.
Michael