think this might be charles and marias son william born c1831
you already have him in 1841 with his parents,1851 with his mother
here is 1861
1861
RG9/537/122/2
william edward goldsmith age 32. b. ramsgate. occ. boatman. head
elizabeth.m. age 25. b. ditto. wife
william edward age 4. b. ditto. son
james thomas age 2. b. ditto. son
edward james age 1mnth. b. ditto. son
living at;christchurch,ramsgate,kent
the writing on this census entry is terrible cannot make out the actual address all i can make out is;5,----- place