Someone was under the car, dead or alive, they could not tell.

Dorian unslung his rope from his saddle, and took off his coat.

"I'll go down and see," he said.
"Be careful," admonished the other, "if you slip into the river, you'll be swept away." Dorian climbed down to where the broken machine lay.

Pinned under it with his body half covered by the water was Mr.Jack Lamont.

He was talking deliriously, calling in broken sentences for help.