In 1670 Cambodia extended as far as Isiampa; but the provinces of Lower Cochin China, as Bien-hoa, Digne-Theun, Vigue Laon, Ann Djiann, and Ita-Tienne--all at one time conquered and annexed--have, for more than a century, shaken off their dependence on Cambodia; and the language and ancient Cambodian race have entirely disappeared in those districts. The different states have now their limits and sovereigns entirely independent of each other. Cambodia is, however, to a certain extent tributary to Siam, but in no degree to Annam; and I cannot understand how, at the present day, the French newspapers, even the ‘Moniteur de la Flotte,’ still less how our admiral in those seas, should habitually confound these two countries. RELIGION OF THE THIÂMES. The suppositions of the Abbé Jacquenet, which I have already quoted and to which I was disposed to give credence, seem to fall before the more accurate information which I have obtained concerning the religion of the Thiâmes or Isiampois. It must be allowed that the only vestiges of Judaism found among them are equally met with amongst Mahometans. They have priests, temples, practise circumcision, abstain from pork, and frequently pronounce, with the greatest veneration, the words Allah and Mahomet. They themselves declare that their present religion was brought to them from Malaisia--that priests still come to them from thence and visit them from time to time. I had this information from some Cambodians of Battambong, who, having been taken prisoners in the wars with the Cochin Chinese, passed eight years in Isiampa. One of them, a blind man, who appeared to me to be remarkable for good sense and judgment--an exceptional case in this country--seemed especially to merit confidence. These facts, and others which I collected regarding the religion of the Thiâmes, who until 1859, the time of their flight, inhabited Cambodia, lead me to infer that the Abbé Gagelin was in error. I was certainly told of two sects into which the tribe was divided; but the only distinguishing point between them was that one ate pork and the other did not. The Thiâmes must formerly have occupied several important districts in Cambodia, principally on the banks of the tributary of the Me-kong. Thus, on the shores of Touli Sap, or the great lake, not far from Battambong, is a place called Campong Thiâme (shore of the Thiâmes). More to the south, near Campong Tchnam, the village where the custom-house of Cambodia is erected, is an island called Isle of Thiâmes. According to tradition, the whole banks of the river, as far as Penom-Peuh, were formerly inhabited by these people; and to this cause is to be attributed the complete absence of remains in these localities. MOUNTAIN AND LOWLAND RACES.