scene is described in Old & New Edinburgh as
'Edinburgh from Rest and be Thankful, Corstorphine Hill.
Zoo is now on the northern slopes of Corstorphine Hill.
prominent landmarks in the centre of this scene are Calton Hill,
Edinburgh Castle and Arthur's Seat.
the left of Calton Hill the view looks across a bay in the Firth
of Forth towards Berwick Law, a hill about 20 miles away in East
Lothian, just visible and looking rather like a small smudge on