Hi Nicky, I understand the actual dates of Martha are b:8 Aug 1862 in Cradock and d:1965 Turffontein, Johannesburg. A family member has also said they believe that her maiden same was actually Schubart and that she had been married to a an Adams with whom she had one child, probably around 1880. I have no idea who her parents were. I also have not followed up on the connection between Schubert and Schubart. Please let me know whether this helps you.