The last photo shows the Art Room which was the room above the Gymnasium and reached by a short flight of steps up from the first floor east corridor. In the late 1970s this room acted as the Lower Sixth common room as well as the art room. It was one of several rooms that many of the pupils might never have had occasion to visit.
The photo has been reduced in size and compressed and is now a little fuzzier than the original. The writing on the wall in the right hand background actually says "Character before cleverness".