The Duke and Duchess of Rothesay must be at Birkhall as of today. Tomorrow they have a joint engagement in Ballater.
Source: Diary Entry, Monday, 24 September 2007
It is alleged that William is up there too with Kate at Tam-na-gar, which now I think of it (strange I didn't think of it before) must overlook Loch Nagar to have this name. Loch Nagar is said to be one of the favorite spots of Prince Charles. He has painted it and ages ago he wrote a children's story for his brothers about an "old man of Loch Nagar".