Then he rotated solemnly, until the stool was as high as it could be made to go, reversed direction, and came down again to keyboard level. Then he looked at the clock on the mantelshelf, shut the lid of the piano with a bang, and walked across to the window. The cook’s cat, a large, dangerous animal, was squatting on the flat top of the ashlar wall that ran, knee high, round the sun garden. He was not easy to see, because he was so arranged that the dapple of evening light through the hedge blended confusingly with his tortoise-shell camouflage. He was waiting for birds. Rupert went up to his bedroom and pulled the bottom long drawer of his chest of drawers right out. Behind it, held in clips to the woodwork of the chest, and invisible whilst the drawer was in position, were a number of implements. One of them was a powerful looking catapult of thick rubber on a steel frame. He took this out, and pocketed two marbles from a box beside his bed. Then he shut everything up and went downstairs again.