The passage was so narrow, and so diversified by sharp turns, that Miss Donovan, shut in behind the closed cover, could perceive little of its nature.

Apparently the ravine was a mere gash in the surface of the desert plain, to be originally discovered purely through accident.

One might pass a hundred yards to either side, and never realise its existence, the hard rock, covered by a thin layer of sand, retaining no trace of wheel-marks in guidance.

How Moore had ever driven so unerringly to the spot was a mystery.

Yet he had done so, and now the team was slowly creeping down the narrow ledge utilised as a road, the slipping wheels securely locked, as they drifted here and there about the sharp corners, ever descending into the unknown depths.
The cliffs arose precipitously on either side, absolutely bare.