The Yongs occupy a province south of the Liews. Their principal city is a small one on the Ma-Yong (River), a tributary of the Cambodia, which empties into it above the desolated province of Cheung San. They are also subject, I believe, to the king of Burmah. The above-mentioned tribes of people in many respects resemble the Northern Laos. Except the Ngieus, they have the same written language, and the difference in the spoken language is not great. The Lwoas are another tribe of the same family. Representatives of all these tribes, as well as Burmese, Karens, Siamese, Peguans and Chinese, are found in all the Laos provinces. Those most numerous in Muang-Luang-Prabang are the Liews. The religion of all the peoples before-mentioned, except the Karens and the Kamoos, is Buddhism, more or less mixed with Shamanism. The Karens, Red Karens, Kamoos and Kamates are not Buddhists, but worship or believe in evil spirits, to whose influence they attribute all that is averse to their sense of good, and whose evil power they must arrest by ceremonies and sacrifices. Thus the Kamoos in cases of sickness do not give medicine, but offer sacrifices to appease the spirits, sometimes killing ten or twelve animals over a single patient. The Kamoos and Kamates are so nearly related that I will speak of them as one tribe. I have purposely omitted mentioning them in connection with the other tribes of people found in Muang-Luang-Prabang, because there does not appear to be any similarity betwixt them, either in language, religion or customs. The Kamoos are quite as numerous in Muang-Luang-Prabang as the Laos: I mean in the province, not the city, for they are a mountain-tribe. They have no province of their own, but are slaves, who, though they live among the mountains, must pay their tribute, each man, to his Laos or Siamese master. They are most numerous in the province of Muang-Luang-Prabang, but are found in all the Laos and in some of the Burmese provinces, in the Hau country of China,[4] and among the independent tribes. They are said to be harmless and honest. They are ignorant and despised, even by the poor, wretched people of this country. Their clothing is even more scanty than that of the almost naked Laos.