Because, clearly, I don’t know how to pace myself. I generally find it to be a bad idea to hit more than two museums in a day, especially if they’re big ones (fortunately the Hunterian was pretty small). I remember once Pinguina and I decided to the Uffizi and one other museum in the same day (which I barely remember, because I slept through it – maybe The Accademia?) and it was a bad, bad idea.
Consequently, you will have to forgive me if my coverage of the Hunterian Art Gallery and the Mackintosh house is spotty at best.