my thoughts. . .
firstly you cannot judge the place by the vegetation, wherever the English travelled they tried to create a bit of 'home' wherever they went. Planting out their little rose gardens, hedges etc.
The same goes with furniture.
I agree that the fellow at the front, is wearing a smoking jacket and therefore believe the photo was taken on his property. He is the only one so casually dressed.
I do not think the lass in the gingham dress is asian but more european, but do think she is probably the nanny, looking after the teddy for the young child.
Margaret