"Within this space are many fine rivers, and some navigable for vessels of considerable burden, and well calculated for the extension of commerce, such as Sarawak, Morotaba, and Sadung. The others, equally fine streams, are barred, but offer admirable means for an easy inland communication; these are the Quop, Boyur, Riam, Samarahan, Lundu, Samatan, &c. In our excursions into the interior of the island, most of these streams have been ascended to a distance of 25 or 30 miles, and some further. We traced the Samarahan river for 70 or 80 miles from its mouth, and passed through portions of the intermediate streams of the Riam, Quop, and Boyur. The Morotaba, which is but another mouth of the Sarawak, we passed through several times from the sea to its junction with that river. The Lundu and Sadung rivers were likewise ascended to the distance of near 30 miles; and plans of all these rivers have been taken as accurately as circumstances would permit, by observations of the latitude and longitude, and various points, and an eye-sketch of the distance of each reach and the compass bearing. The entrances into the Sarawak and Morotaba were carefully examined, and the former accurately laid down. The productions of the country attracted our attention, and the articles best fitted for commerce have been already enumerated. Among these are, first, minerals; say gold, tin, probably copper, antimony-ore, and fine white clay for pipes. Secondly, woods of the finest descriptions, for ship-building, and other purposes; besides aloes wood (_lignum aloes_), and arang or ebony wood, canes, and ratans. To these may be added, among vegetable productions, sago, compon, rice, &c., &c.