I have now obtained a copy of this birth certificate. It states that Martha Davis was born in Dec 1850, baptised 1851 to William and Jane Davis who were living at Victoria Barracks, Sydney at the time. It lists William's occupation as BANDSMAN IN XI REGT ie 11th regiment of foot. This regiment was in Australia from 1845 to 1856/7. What is the best way to ascertain whether the family stayed in Australia? And therefore to determine that this is the correct Martha Davis? Thank you.