The next common disease in the low country of Arabia, the intermediate island of Masuah, and all Abyssinia, (for the diseases are exactly similar in all this tract) is the Tertian fever, which is in nothing different from our Tertian, and is successfully treated here in the same manner as in Europe. As no species of this disease (at least that I have seen) menaces the patient with death, especially in the beginning of the disorder, some time may be allowed for preparation to those who doubt the effect of the bark in the country. But still I apprehend the safest way is to give small doses from the beginning, on the first intermission, or even remission, though this should be somewhat obscure and uncertain. To speak plainly; when the stomach nauseates, the head akes, yawning becomes frequent, and not an excessive pain in the nape of the neck, when a shivering which goes quickly off, a coldness down the spine, a more than ordinary cowardliness and inactivity prevails, (the heat of the climate gives one always enough of these last sensations); I say, when any number of these symptoms unite, have recourse to the powder of bark infused in water; shut your mouth against every sort of food; and, at the crisis, your disease will immediately decide its name among the class of fevers. All fevers end in intermittents; and if these intermittents continue long, and the first evacuations by the bark have not been copious and constant, these fevers generally end in dysenteries, which are always tedious and very frequently prove mortal. Bark in small quantities, ipecacuanha, too, in very small quantities so as not to vomit, water, and fruit not over ripe, have been found the most successful remedies. As for the other species of dysentery, which begins with a constant diarrhœa, when the guts at last are excoriated, and the mucus voided by the stools, this disease is rarely cured if it begins with the rainy season. But if, on the contrary, it happen either in the sunny six months, or the end of the rainy ones immediately next to them, small doses of ipecacuanha either carry it off, or it changes into an intermitting fever, which yields afterwards to the bark. And it always has seemed to me that there is a great affinity between the fevers and dysenteries in these countries, the one ending in the other almost perpetually. The next disease, which we may say is endemial in the countries before mentioned, is called _hanzeer_, the _hogs_ or the _swine_, and is a swelling of the glands of the throat, and under the arms. This the ignorant inhabitants endeavour to bring to a suppuration, but in vain; they then open them in several places; a sore and running follows, and a disease very much resembling what is called in Europe the Evil.