Saturday morning and the lovely Liz went into the studio and stamped her feet in an exceedingly petulant manner. She expressed the view that the room was a tad untidy. The result is that I am banned from going out until it is tidied up, not a little, but a lot, Two hours later and a transformation has occurred; how long will it remain as such?

The drawing is of the coal quay at Battersea Power station.