“What is it?” I said.

He answered, still stooping above the track.

“The cut-under stopped here.”

“How do you know that?” I asked, for it seemed hardly possible to determine where a wheeled vehicle had stopped.

“It's quite clear,” he replied. “The horse has moved about without going on.”

I now saw it. The hoof-marks of the horse had displaced the dust where it had several times changed position.

“And that's not all,” Marquis continued. “Something has happened to the cut-under here!”

I was now closely beside him.

“It was broken down, perhaps, or some accident to the harness?”

“No,” he replied. “The wheel tracks are here broadened, as though they had skidded on a turn. This would mean little if the cut-under had been moving at the time. But it was not moving; the horse was standing. The cut-under had stopped.”