He looked about him and decided instantly.

There was no delaying now.
"Supposing I do lay it on the top," he said, "and go away, they'll know who took it.

I'm the last to close up.

Besides, other things will happen." At once he became the man of action.
"I must get out of this," he thought.
He hurried into his little room, took down his light overcoat and hat, locked his desk, and grabbed the satchel.

Then he turned out all but one light and opened the door.