Thank you slowhands for all you have told me - more than I could have expected.

I shall follow up on the Oakdene School and also the Dilke Hospital.

Annie Dunbar (1891 census) was George's illegitimate half sister - David Mitchell was father to both.

George's first marriage was in Scotland (1888) - he did not seem to have much luck with his wives. I believe in the 1891 census he is shown as a widower.

I did find on Google a reference to a Dr.G.A. Mitchell setting up a practice in Yorkshire - late 1920's - and as he was born in Yorkshire this seemed promising. Howver, I did not receive a reply to my 2 enquiries.

I thank you again slowhands and send you best wishes from New Zealand......