nto the room, followed by Bill, he felt it almost as a shock
that there was now no body of Robert lying there between the two doors.
But there was a dark stain which showed where the dead man's head had
been, and Antony knelt down over it, as he had knelt twenty-four hours
before.

"I want to go through it again," he said. "You must be Cayley. Cayley
said he would get some water. I remember thinking that water wasn't
much good to a dead man, and that probably he was only too glad to
do anything rather than nothing. He came back with a wet sponge and
a handkerchief. I suppose he got the handkerchief from the chest of
drawers. Wait a bit."

He got up and went into the adjoining room; looked round it, pulled open
a drawer or two, and, after shutting all the doors, came back to the
office.

"The sponge is there, and there are handkerchiefs in the top right-hand
drawer. Now then, Bill, just pretend you're Cayley. You've just said
something about water, and you get up."

Feeling that it was all a little uncanny, Bill, who had been kneeling
beside his friend, got up and walked out. Antony, as he had done on the
previous day, looked up after him as he went. Bill turned into the room
on the right, opened the drawer and got the handkerchief, damped the
sponge and came back.

"Well?" he said wonderingly.

Antony shook his head.

"It's all different," he said. "For one thing, you made a devil of a
noise and Cayley didn't."

"Perhaps you weren't listening when Cayley went in?"

"I wasn't. But I should have heard him if I could have heard him, and I
should have remembered afterwards."

"Perhaps Cayley shut the door after him."

"Wait!"

He pressed his hand over his eyes and thought. It wasn't anything which
he had heard, but something 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 co