I am really grateful to you and apologise for all the trouble I've put you to. You've already given me more than I hoped for. My query about her age simply derived from the fact that I found an Emma Best who was born in India in the 1881 British Census and she was 24 years old. In Sydney, also, Miss Best lead a fairly physically demanding life running her dogs home and this lady (who would then have been in her mid-late 40s) fitted. Perhaps I'm completely wrong though!
Also, an article I read on the present owner of Moyenne (Brendan Grimshaw) suggested that while she wanted to be buried on her island it was her family who insisted on burying her on Mahe. It's interesting that there is no sign of any family in these records relating to her death. Her brother Cadogan Henry Best was in Sydney with her and returned to the Seychelles in October 1909. He must have left again before she died.
Anyway, again, many thanks,