There are two species of leprosy known in these parts. The milder sort, or impetigo, as I apprehend it to be, is very common among the inhabitants of Nias, great numbers of whom are covered with a white scurf or scales that renders them loathsome to the sight. But this distemper, though disagreeable from the violent itching and other inconveniences with which it is attended, does not appear immediately to affect the health, slaves in that situation being bought and sold for field and other outdoor work. It is communicated from parents to their offspring, but though hereditary it is not contagious. I have sometimes been induced to think it nothing more than a confirmed stage of the serpigo or ringworm, or it may be the same with what is elsewhere termed the shingles. I have known a Nias man who has effected a temporary removal of this scurf by the frequent application of the golinggang or daun kurap (Cassia alata) and such other herbs as are used to cure the ringworm, and sometimes by rubbing gunpowder and strong acids to his skin; but it always returned after some time. The other species with which the country people are in some instances affected is doubtless, from the description given of its dreadful symptoms, that severe kind of leprosy which has been termed elephantiasis, and is particularly described in the Asiatic Researches Volume 2, the skin coming off in flakes, and the flesh falling from the bones, as in the lues venerea. This disorder being esteemed highly infectious, the unhappy wretch who labours under it is driven from the village he belonged to into the woods, where victuals are left for him from time to time by his relations. A prang and a knife are likewise delivered to him, that he may build himself a hut, which is generally erected near to some river or lake, continual bathing being supposed to have some effect in removing the disorder, or alleviating the misery of the patient. Few instances of recovery have been known. There is a disease called the nambi which bears some affinity to this, attacking the feet chiefly, the flesh of which it eats away. As none but the lowest class of people seem to suffer from this complaint I imagine it proceeds in a great degree from want of cleanliness. SMALLPOX.