unascertained situation in the Batta country; one in the Korinchi country, lately visited by Mr. C. Campbel; and another in the Lampong country, extending towards Pasummah, navigated by boats of a large class with sails, and requires a day and night to effect the passage across it; which may be the case in the rainy season, as that part of the island through which the Tulang Bawang River flows is subject to extensive inundations, causing it to communicate with the river of the Palembang. In a journey made many years since by a son of the sultan of the latter place, to visit the English resident at Croee, he is said to have proceeded by the way of that lake. It is much to be regretted that the situation of so important a feature in the geography of the island should be at this day the subject of uncertain conjecture.

WATERFALLS.

Waterfalls and cascades are not uncommon, as may be supposed in a country of so uneven a surface as that of the western coast. A remarkable one descends from the north side of Mount Pugong. The island of Mansalar, lying off and affording shelter to the bay of Tappanuli, presents to the view a fall of very striking appearance, the reservoir of which the natives assert (in their fondness for the marvellous) to be a huge shell of the species called kima (Chama gigas) found in great quantities in that bay, as well as at New Guinea and other parts of the east.* At the bottom of this fall ships occasionally take in their water without being under the necessity of landing their casks; but such attempts are liable to extreme hazard. A ship from England (the Elgin) attracted by the appearance from sea of a small but beautiful cascade descending perpendicularly from the steep cliff, that, like an immense rampart, lines the seashore near Manna, sent a boat in order to procure fresh water; but she was lost in the surf, and the crew drowned.

(*Footnote. The largest I have seen was brought from Tappanuli by Mr. James Moore of Arno's Vale in the north of Ireland. It is 3 feet 3 1/2 inches in its longest diameter, and 2 feet 1 1/4 inches across. One of the methods of taking them in deep water is by thrusting a long bamboo between the valves as they lie open, when, by the immediate closure which follows, they are made fast. The substance of the shell is perfectly white, several inches thick, is worked by the natives into arm-rings, and in the hands of our artists is found to take a polish equal to the finest statuary marble.)

RIVERS.

No country in the world is better supplied with water than the western coast of the island. Springs are found wherever they are sought for, and the rivers are innumerable; but they are in general too small and rapid for the purpose of navigation. The vicinity of the mountains to that side of the island occasions this profusion of rivulets, and at the same time the imperfections that attend them, by not allowing them space to accumulate to any considerable size. On the eastern coast the distance of the range of hills not only affords a larger scope for the course of the rivers before they disembogue, presents a greater surface for the receptacle of rain and vapours, and enables them to unite a greater number of subsidiary streams, but also renders the flux more steady and uniform by the extent of level space than where the torrent rolls more immediately from the mountains. But it is not to be understood that on the western side there are no large rivers. Kataun, Indrapura, Tabuyong, and Sinkel have a claim to that title, although inferior in size to Palembang, Jambi, Indragiri, and Siak. The latter derive also a material advantage from the shelter given to them by the peninsula of Malacca, and Borneo, Banca, and the other islands of the Archipelago, which, breaking the force of the sea, prevent the surf from forming those bars that choke the entrance of the south-western rivers, and render them impracticable to boats of any considerable draught of water. These labour too under this additional inconvenience that scarcely any except the largest run out to sea in a direct course. The continual action of the surf, more powerful than the ordinary force of the stream, throws up at their mouths a bank of sand, which in many instances has the effect of diverting their course to a direction parallel with the shore, between the cliffs and the beach, until the accumulated waters at length force their way wherever there is found the weakest resistance. In the southerly monsoon, when the surfs are usually highest, and the streams, from the dryness of the weather, least rapid, this parallel course is of the greatest extent; and Moco-moco River takes a course, at times, of two or three miles in this manner, before it mixes with the sea; but as the rivers swell with the rain they gradually remove obstructions and recover their natural channel.

AIR.

The heat of the air is by no means so intense as might be expected in a country occupying the middle of the torrid zone. It is more temperate than in many regions without the tropics, the thermometer, at the most sultry hour, which is about two in the afternoon, generally fluctuating between 82 and 85 degrees. I do not recollect to have ever seen it higher than 86 in the shade, at Fort Marlborough; although at Natal, in latitude 34 minutes north, it is not unfrequently at 87 and 88 degrees. At sunrise it is usually as low as 70; the sensation of cold however is much greater than this would seem to indicate, as it occasions shivering and a chattering of the teeth; doubtless from the greater relaxation of the body and openness of the pores in that climate; for the same temperature in England would be esteemed a considerable degree of warmth. These observations on the state of the air apply only to the districts near the sea-coast, where, from their comparatively low situation, and the greater compression of the atmosphere, the sun's rays operate more powerfully. Inland, as the country ascends, the degree of heat decreases rapidly, insomuch that beyond the first range of hills the inhabitants find it expedient to light fires in the morning, and continue them till the day is advanced, for the purpose of warming themselves; a practice unknown in the other parts of the island; and in the journal of Lieutenant Dare's expedition it appears that during one night's halt on the summit of a mountain, in the rainy season, he lost several of his party from the severity of the weather, whilst the thermometer was not lower than 40 degrees. To the cold also they attribute the backwardness in growth of the coconut-tree, which is sometimes twenty or thirty years in coming to perfection, and often fails to produce fruit. Situations are uniformly colder in proportion to their height above the level of the sea, unless where local circumstances, such as the neighbourhood of sandy plains, contribute to produce a contrary effect; but in Sumatra the coolness of the air is promoted by the quality of the soil, which is clayey, and the constant and strong verdure that prevails, which, by absorbing the sun's rays, prevents the effect of their reflection. The circumstance of the island being so narrow contributes also to its general temperateness, as wind directly or recently from the sea is seldom possessed of any violent degree of heat, usually acquired in passing over large tracts of land in the tropical climates. Frost, snow, and hail I believe to be unknown to the inhabitants. The hill-people in the country of Lampong speak indeed of a peculiar kind of rain that falls there, which some have supposed to be what we call sleet; but the fact is not sufficiently established. The atmosphere is in common more cloudy than in Europe, which is sensibly perceived from the infrequency of clear starlight nights. This may proceed from the greater rarefaction of the air occasioning the clouds to descend lower and become more opaque, or merely from the stronger heat exhaling from the land and sea a thicker and more plentiful vapour. The fog, called kabut by the natives, which is observed to rise every morning among the distant hills, is