On the far side, also smooth like the walls, was the reverse of a wide, but not high, iron door.

Here there was a little more light, for the high-up aperture over the door opened to the air.
Lady Arabella took from her girdle another small key, which she inserted in a keyhole in the centre of a massive lock.

The great bolt seemed wonderfully hung, for the moment the small key was turned, the bolts of the great lock moved noiselessly and the iron doors swung open.

On the stone steps outside stood Oolanga, with the mongoose box slung over his shoulder.

Lady Arabella stood a little on one side, and the African, accepting the movement as an invitation, entered in an obsequious way.
The moment, however, that he was inside, he gave a quick look around him.
"Much death here--big death.