He could not lower it in the ordinary way after he had entered the car, but in fifteen minutes he had arranged a pulley and rope by which, after the car had gone below the surface, he could lower the grating to its place.

He got in, started down into the dark hole, stopped the engine, lowered the grating, went down a little farther, and turned on the electric lights.
The descent of Rovinski was a succession of the wildest sensations of amazed delight.

Stratum after stratum passed before his astonished eyes, and, when he had gone down low enough, he allowed himself the most extravagant expressions of ecstasy.

His progress was not so regular and steady as that of Roland Clewe had been.

He found that he had perfect control of the engine and car, and sometimes he went down rapidly, sometimes slowly, and frequently he stopped.