It was torn up in a wastepaper basket, but when they pieced it back together, they discovered that someone in their ranks had been selling military secrets to Germany.
Harry swept the last of the droppings into a rubbish bag and threw the bag over Ron's head into the wastepaper basket in the corner, which swallowed them and belched loudly.
At the Yard he looked for Williams and when he had found him he said: 'Williams, remember saying on the telephone that all your Wickham notes were good for was the wastepaper basket?