Hi,
I can't see Sarah Alicia after 1851 but I think John and Sarah Selina SMITH went to Australia. They had further children,
https://online.justice.vic.gov.au/bdm/indexsearch.dojJohn David SMITH 1855 Collingwood, Victoria
Parents: John SMITH, Sarah Selina RICHARDS
Peter Henry SMITH 1858 Pentridge, Victoria
Parents: John SMITH, Sarah Selina RICHARDS
Edward Shram SMITH 1862 Pent, Victoria
Parents: John SMITH, Sarah Selina RICHARDS
It looks like 2 of these children died young,
John David SMITH
Death: 1856 Victoria
Father: John
Mother: Sarah Selina RICHARDS
Age: 1 (I think this could be months)
Peter Henry SMITH
Death: 1859 Victoria
Father: John
Mother: Sarah Selina RICHARDS
Age: 13 (I think this could be 13 months)
Sarah Selina died in 1866,
Sarah Selina SMITH
Father's name: RICHARDS Reube
Mother's name: Sarah (KEMP)
Place of birth: ENGL
Age: 37
The Argus, Melbourne, Australia
25 Jan 1866
SMITH.—On the 30th ult., at Hotham, Sarah Selina,the beloved wife of John SMITH, storekeeper, Pentridge Stockade, youngest daughter of Reuben RICHARDS, Esq., of Gosport, Hants, aged thirty-seven.
http://www.rootschat.com/links/01n4c/I'm not sure that this is the family you are looking for

Are you looking for Sarah Alicia b.1851 or a Sarah Ann b.1850
Regards,
Daisy