Trying to locate Robert Grace in the 1871 census,died 1878 Steyning workhouse.
Found him in Brighton 1851/1861 census.
The only census he isnt in is 1871
In 1881 and 1891 he was living with his mother in Jersey Street..he died 1899
The whole Grace family seem to be pretty elusive in 1871

Have you found any of them?
for info. GRACE family on other censuses Brighton Sussex
1851c Robert b1814 Gardener, Sarah b1823 children Sarah 4,
Robert 3 (1848) Brighton , James 1
1861c Robert b1814 Gardener , children
Robert 13, James 11 & George 7
1861c Sarah b1823 Petworth, children Sarah 14, Henry 4
visitors Head James Clements Gardener
1881c Sarah
Wid b1823 Wisborough Green with her two boys
Robert 32 Fly Driver & George 28 - Jersey Street
1891c Sarah
Wid 67 b1824 Petworth,
Robert 44 occ carriage Driver – Jersey Street
1901 Sarah b1823 Wisborough Green Brighton Union Workhouse
The census posted by venusian looks a possibility for Robert Junior
1871 RG10/1066 BARCOMBE FOLIO92 PAGE 13
BARCOMBE HOUSE
ROBERT GRACE 23 UNMARRIED GROOM DOMESTIC SERVANT BORN LEWES
Hope this is the one.
There possibility for George
1871 RG10; Piece: 1064; Folio: 69; Page: 23
George Grace 17 Brighton Servant
Head James Day