Hello Jeune,
This looks like Alfred in the 1851 census:
HO107 1643 Folio 195 Sch 57 Newick
Christian Brooks, head, widow, 40, Nurse washerwoman etc, born Fletching
Ellen, dau, unmarried, 19, born Newick
William, son, unm, 17, Ag Lab, born Newick
Alfred, son, unm, 14, Grocershop Porter, born Newick
Charles, son, unm, 10, Ag Lab, born Newick
Amos, son, unm, 7, Scholar, born Newick
Henry, son, unm, 5, born Newick
This has been taken from the index compiled by June Barnes (vol 21) in book form, but I believe that Alfred's mother's name may be Christine (nee Roser) as I have found the following marriage on the SMI.
Lewes St John sub Castro
2 May 1831
Edward Brooks
Christine Roser
botp
On the GRO index, there is the following:
Deaths; June quarter 1847
Lewes &c 7 299
Edward Brooks
Alfred's wife may be Elizabeth Chatfield, who is in the 1851 census in Chailey Village, age 14, house servant, born Chailey, in the household of John Cornwell. This would explain the Henry Chatfield in Arranroot's 1861 post.
The IGI has a marriage that has been submitted by an LDS Church member for 28 July 1860, at St Nicholas, Brighton. Although I wouldn't necessarily trust this, the GRO index has entries for both Alfred Brooks and Elizabeth Chatsfield in Marriages, Sept quarter 1860, Brighton 2b 280.
Hope that's of some help.
Regards
Phil