which he had seen. He tried desperately hard to see it again.... He saw Cayley getting up, opening the door from the office, leaving it open and walking into the passage, turning to the door on the right, opening it, going in, and then—What did his eyes see after that? If they would only tell him again!
Suddenly he jumped up, his face alight. "Bill, I've got it!" he cried.
"What?"
"The shadow on the wall! I was looking at the shadow on the wall. Oh, ass, and ten times ass!"
Bill looked uncomprehendingly at him. Antony took his arm and pointed to the wall of the passage.
"Look at the sunlight on it," he said. "That's because you've left the door of that room open. The sun comes straight in through the windows. Now, I'm going to shut the door. Look! D'you see how the shadow moves across? That's what I saw the shadow moving across as the door shut behind him. Bill, go in and shut the door behind you quite naturally. Quick!"
Bill went out and Antony knelt, watching eagerly.
"I thought so!" he cried. "I knew it couldn't have been that."
"What happened?" said Bill, coming back.
"Just what you would expect. The sunlight came, and the shadow moved back again all in one movement."
"And what happened yesterday?"
