Overhead the dark and bulky cylinders cut against the reflected glimmer on the skylights; below, valve-gear and connecting-rod flashed across the gloom, and the twinkling cranks spun in their shallow pit.

The big columns that held the cylinders rocked; crank and connecting-rod spun too fast for him to see.

Shedding frightful blows with only an angry shake of his head, he would lower it and charge as a wild boar charges, while his huge arms flew like lunatic connecting-rods.