As a general rule, the sharks and alligators do not meddle with human beings up here, but confine their attention to the fish, the dogs, and the numerous droves of wild pigs constantly passing from one bank to the other. During the fruit season the movement among these last is very remarkable; Mr. Brereton told me he once saw at least three hundred in one drove crossing the river Batang Lupar, where it was above seven hundred yards broad. I have often seen them myself in lesser numbers; on one occasion I was present when seventeen were killed, which formed a regular feast for some aborigines who secured the bodies. Generally a fine old boar leads the way, and is followed very closely by the rest. They grow to a great size; I have seen one carefully measured, his height at the shoulder was forty-two inches, and the length of head was twenty-two. The Senahs have built many of their farm-houses in the trees overhanging the stream; in one was a whole family engaged in the important operation of preparing dinner; and it was amusing to observe the little children coming fearlessly to the very edge of the platform above the rushing stream to look at us, standing in positions so dangerous that they would drive an English mother distracted. As we approach the interior of the Sarawak river, the mountains become more lofty, and the stream takes the character of a torrent; after heavy rains it rises suddenly and to a great height. I have seen grass left by the receding waters at least forty feet above our present level. Even after one heavy shower, all the fords are impassable, so that to avoid this inconvenience the Senah Dayaks have thrown lofty bridges across, to facilitate their communication between their several villages. How light and elegant do these suspension-bridges look--one in particular I will attempt to describe. It was a broad part of the stream, and two fine old trees hung over the water opposite each other; long bamboos well lashed together formed the main portion, and were fastened by smaller ones to the branches above; railings on either side were added to give greater strength and security, yet the whole affair appeared so flimsy, and was so far above the stream, that when we saw a woman and child pass over it, we drew our breath till they were safe on the other side. And yet we knew they were secure.