I had a little look up for you, Jill.
As you may know in the 1901 Census, he says he's born in Norwich, but in 1891, it's Topham, 1881 Lopton, and 1861 North Lopham.
1851 Census shows him in North Lopham with father Titus Brock, born 1803 in North Lopham and who is on Parish Relief, poor man. His wife is Susan, same date and place of birth and there are Frederick 16, Elizabeth 14, Jeremiah 12, Edward 10, Adelaide 8 (Richard's twin) and Eliza 2.
There are a whole load of Brocks in this area, but not - as far as I know - linked to my family.
meles