To turnerchimes, I have been away on holiday so was not able to reply sooner, so can now say many thanks for your suggestions. I am sure that that is the case with the focus on the subjects and the buildings, in turn, as you have described.
The lady in America at the Rockefeller Archives thought the white house was part of a golf course for the elite to stay in on their many long holidays and playing that game.
The one with the family group by the steps of the brick building is more likely to be a place they stay at, as you have pointed out. I agree. And, you will be pleased to know, the big man himself is J D Rockefeller, as the lady in America has confirmed it to me! He was quite old then so did not look himself, as it were! I have one other image which I will send soon.