This Charles is with George and Susannah's family in 1841 but that census doesn't give the relationship. It is possible that this is George's sister Jane's illegitimate child.
He worked as a Carpenter in 1861 and resided at Cold Harbour, Lingfield. 1
1 Ancestry.com Online Census and BMD, www.ancestry.com, 1861C.
FreeBMD Online Index of BMD, England & Wales, www.freebmd.org.uk, Marriages Mar 1861
Cobby Jane E Grinstead 2b 143
Dines Elizabeth Mary E Grinstead 2b 143
Dives Elizabeth Mary E Grinstead 2b 143
Head Charles E. Grinstead 2b 143
Warren Samuel Silvester E Grinstead 2b 143.
3 National Archives UK, Will of mother Jane Head 1844. I give and bequeath all my Estate and Effects unto my illegitimate childen Edward Head, Charles Head and Eliza Alfred(?) Head share and share alike as tenants in common(?). And ....
4 Ancestry.com Online Census and BMD, www.ancestry.com, 1861C, 1871C.
FreeBMD Online Index of BMD, England & Wales, www.freebmd.org.uk, Deaths Dec 1855
Head Elizabeth E Grinstead 2b 71.
Ancestry.com Online Census and BMD, www.ancestry.com, England & Wales, FreeBMD Death Index: 1837-1915
Name: Elizabeth Head
Year of Registration: 1853
Quarter of Registration: Jan-Feb-Mar