At least I think this was so, since now for the first time I observed a kind of little window in its rocky face.

It stood about five feet from its floor level, and was perhaps ten inches square, not more.

In short, except for its shape it resembled a ship's porthole rather than a window.

Its substance appeared to be talc, or some such material, and inches thick, yet through it, after Oro had cast aside some sort of covering, came a glare like that of a search-light.

In fact it was a search-light so far as concerned one of its purposes.
By this window or porthole lay a pile of cloaks, also four objects which looked like Zulu battle shields cut in some unknown metal or material.
Very deftly, very quietly, Yva lifted these cloaks and wrapped one of them about each of us, and while she was thus employed I noticed that they were of a substance very similar to that of the gown she wore, which I have described, but harder.