As the island is in most parts a flat and marshy jungle, extending about 200 miles inland, and the rivers are not rapid, although numerous, it would be presumed, especially as the dews of the night are very heavy, that the island would be fatal to Europeans. Such, however, proved not to be the case. During our repeated visits to the island (a period of nearly two years), we only lost one man, by a most imprudent exposure to the night air, sleeping in an open boat, without the awning being spread, and exposed to a very heavy dew. Borneo abounds with rivers, some of them very fine, running inland for one or two hundred miles. Most of these rivers have been taken possession of and colonised by the various tribes indigenous to the neighbouring isles and continent, to wit, Arabs, Malays, Illanoans, Bughis, the natives of Celebes, Chinese, &c. The reason for this emigration to Borneo is the protection afforded by these rivers; for as all these tribes live entirely by piracy, they here find a safe retreat for themselves and their vessels. How long ago their settlements may have been first made, or what opposition they may have received from the Dyak aborigines, it is impossible to say; but as most of the head men in Borneo claim to be of Arab descent, it may be presumed that many years must have elapsed since the aboriginal tribes of Dyaks and Dusums were dispossessed of the rivers, and driven into the interior. Of these people I shall speak hereafter; there is no doubt but that they were the original inhabitants of the whole island, and that the various tribes I have mentioned are but colonists for piratical purposes. These piratical hordes generally infest the high lands upon the shores of these rivers, which are difficult of navigation; and, moreover, from their numerous branches, their resorts are not very easily discovered. These towns are fortified with stockades, guns of various calibre, and the passage up the river defended by booms or piles of timber, which admit of but one narrow passage for their prahus. It must be understood that these piratical hordes are not only independent of each other, but often at war, in consequence of their spoliations. Some of their chiefs have taken upon them the titles of princes; and one has assumed, as is well known, that of Sultan of Borneo, another of Sooloo,--how far entitled to such a rank it would be difficult to say; but this is certain, that there must be a beginning to every dynasty; and if we trace back far into history, we shall find, both at home and abroad, that most dynasties have had their origin in freebooting on a grand scale,--even the House of Hapsburg itself is derived from no better an origin; and the Sultan of Borneo, whoever he may be, and if a Sultan does exist, some 800 years hence will, by the antiquity of his title, prove his high descent, as the German emperor now does his own.