Beyond the marsh the country is higher, and has a much larger population. We passed a long line of temporary huts, on a plain on the right bank, with crowds of men and women hard at work making salt. They obtain it by mixing the earth, which is here highly saline, with water, in a pot with a small hole in it, and then evaporating the liquid, which runs through, in the sun. From the number of women we saw carrying it off in bags, we concluded that vast quantities must be made at these works. It is worth observing that on soils like this, containing salt, the cotton is of larger and finer staple than elsewhere. We saw large tracts of this rich brackish soil both in the Shire and Zambesi valleys, and hence, probably, sea-island cotton would do well; a single plant of it, reared by Major Sicard, flourished and produced the long staple and peculiar tinge of this celebrated variety, though planted only in the street at Tette; and there also a salt efflorescence appears, probably from decomposition of the rock, off which the people scrape it for use. The large village of the chief, Mankokwe, occupies a site on the right bank; he owns a number of fertile islands, and is said to be the Rundo, or paramount chief, of a large district. Being of an unhappy suspicious disposition, he would not see us; so we thought it best to move on, rather than spend time in seeking his favour. On the 25th August we reached Dakanamoio island, opposite the perpendicular bluff on which Chibisa's village stands; he had gone, with most of his people, to live near the Zambesi, but his headman was civil, and promised us guides and whatever else we needed. A few of the men were busy cleaning, sorting, spinning, and weaving cotton. This is a common sight in nearly every village, and each family appears to have its patch of cotton, as our own ancestors in Scotland had each his patch of flax. Near sunset an immense flock of the large species of horn-bill (_Buceros cristatus_) came here to roost on the great trees which skirt the edge of the cliff. They leave early in the morning, often before sunrise, for their feeding-places, coming and going in pairs. They are evidently of a loving disposition, and strongly attached to each other, the male always nestling close beside his mate. A fine male fell to the ground, from fear, at the report of Dr. Kirk's gun; it was caught and kept on board; the female did not go off in the mornings to feed with the others, but flew round the ship, anxiously trying, by her plaintive calls, to induce her beloved one to follow her: she came again in the evenings to repeat the invitations. The poor disconsolate captive soon refused to eat, and in five days died of grief, because he could not have her company. No internal injury could be detected after death.