Hi Julie,
From the biographical index of SA, not always accurate but a good reference point:-
COURTENAY Thomas b.c.1816 England, died 1878 SA
Arrived: 26.8.1848 on the ship CONSTANCE
Tailor, residing Adelaide
Married l/2: Mary b.c.1815 England died 29.8.1848 Alberton, SA. Arrived SA with husband.
Child by 1848
Married 2/2: Alice Symons ROWE parents John & Joanna Rowe
Baptism: 22.2.1874 Cornwall, England
Death: 1.5.1887SA buried West Terrace Cemetery
Arrived: 12.1.1849 from England on the ship SAMUEL BODDINGTON
Regards,
Sashar