that just leaves alfred goldsmith born c 1873
his middle name was john and his birth was actually regd in apr/may/jun 1872 in thanet
you already have him with his parents william/elizabeth in 1881
there is only 1 alfred goldsmith birth regd in thanet between 1867-1877
this is the only one i can see in 1891 that might be him the only problem with this entry is that there is a george goldsmith and mary goldsmith in the same household
1891
RG12/731/110/14
george lucas age 38. b. ramsgate. occ. labourer. head
emily lucas age 35. b. ditto. wife
george lucas age 13. b. ditto. son
emma lucas age 8. b. ditto. daughter
richard lucas age 7. b. ditto. son
william lucas age 6. b. ditto. son.
george goldsmith age 61. b. ramsgate. lodger(mar)
mary goldsmith age 65. b. ditto. lodger.(mar)
nelly goldsmith age 13. b. ditto. lodger
alfred goldsmith age 18. b. ditto. occ. domestic servant. lodger
living at;13,james passage,christchurch,ramsgate,kent