From Thorn's account of his Journey to South Africa. - "In the country of Kango is the greatest natural curiosity of South Africa, a grotto of unknown extent. This I visited, and spent four or five hours in it. It was generally supposed that the end of it had been discovered, but we proved it to be still unknown; though, from the information I received, we proceeded into it further than any others, and our entrance into the third newly discovered chambers, or cave, was only prevented by a descent of fourteen feet. This great and astonishing work of God is divided into various apartments, from fourteen to seventy feet in length, and eight to one hundred in breadth. By measurement, I found that we had proceeded about nine hundred feet into the cavern of a mountain, of five hundred feet in perpendicular height; the grott) is about two hundred feet above the level of the river running by the hill.

"The stalactites, united or disunited, form a hundred figures, so that, without any effort of imagination, nature would seem here to have assumed the province of art: for her canopies, organs, pulpits, vast candles, immense pillars, heads even of men and animals, meet the astonished visitor on all sides; so that he supposes himself in a new part of the universe. Eye, thought, and feeling, are equally overpowered; and, to complete this remarkable assemblage, there are various baths, or cisterns of water, as clear as crystal, divided by partitions, as if a most ingenious sculptor had wrought for some weeks in this subterraneous place of nature. Ten young colonists, with two slave guides, and my servant, were with me. We had a flambeau and a number of large candles; but even these did not chase away the darkness which eclipsed the beauties of this great work of nature, which had been forming from age to age, and was first discovered in the year 1788. It is a remarkable circumstance, that no traveller appears to have visited it, or the various sub-districts which I have described above, since that time till we entered it.'