Donnelly glanced at him quickly. Then he put the rabbit into the pocket of his overcoat, from which its long ears protruded ludicrously.

“Come on!” he said.

The next door was locked, and here Donnelly displayed his professional talents. Before Ross could quite see what he was at, he had taken something from his pocket; he bent forward, and almost at once the lock clicked, and he opened the door.

It seemed to Ross that nothing could have been more eloquent of crime, of shameful secrecy and misery, than that room. There was a wretched little makeshift bed against one wall, made up of burlap bags and a ragged portière; there was a box on which stood a lantern, an empty corned beef tin, and a crushed and sodden packet of cigarettes. There was nothing else.

With a leaden heart, he looked at Donnelly, and saw him very grave.

“Come on!” he said, again.

And they went on, into every corner of that house that was so empty and yet so filled with questions. They found nothing more. Some one had been here, and some one had gone; that was all.

Donnelly led the way back to the room where that some one had been.

“Now we’ll see if we can find some more clews here,” he said. “Like the fellows in the story books.”

He took up the packet of cigarettes and went over to the window with it. But, instead of examining the object in his hand, his glance was arrested by something outside, and he stood staring straight before him so long that Ross came up beside him, to see for himself.