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Rh Votan may not, possibly, have passed into Europe; he may have travelled altogether in Africa. His singular allusion to "a way which the Culebres had bored" seems at first inexplicable; but Dr. Livingstone's last letters, published 8th November, 1869, in the "Proceedings of the Royal Geographical Society," mention that "tribes live in underground houses in Rua. Some excavations are said to be thirty miles long, and have running rills in them; a whole district can stand a siege in them. The 'writings' therein, I have been told by some of the people, are drawings of animals, and not letters; otherwise I should have gone to see them. People very dark, well made, and outer angle of eyes slanting inward."

And Captain Grant, who accompanied Captain Speke in his famous exploration of the sources of the Nile, tells of a tunnel or subway under the river Kaōma, on the highway between Loowemba and Marunga, near Lake Tanganyika. His guide Manila describes it to him:

"I asked Manua if he had ever seen any country resembling it. His reply was, 'This country reminds me of what I saw in the country to the south of the Lake Tanganyika, when travelling with an Arab's caravan from Unjanyembeh. There is a river there called the Kaōma, running into the lake, the sides of which are similar in precipitousness to the rocks before us.' I then asked, 'Do the people cross this river in boats?' 'No; they have no boats; and even if they had, the people could not land, as the sides are too steep: they pass underneath the river by a natural tunnel, or subway.' He and all his party went through it on their way from Loowemba to Ooroongoo, and returned by it. He described its length as having taken them from sunrise till noon to pass through it, and so high that, if mounted upon camels, they could not touch the top. Tall reeds, the thickness of a walking-stick, grew inside; the road was strewed with white pebbles, and so wide—four hundred yards—that they could see their way tolerably well while passing through it. The rocks looked as if they had been planed by artificial means. Water never came through from the river overhead; it was procured by digging wells. Manua added that the people of Wambweh take shelter in this tunnel, and