On one account the situation of the Indian army in Egypt is not a little curious. It consisted of about eight thousand men; of which number about one-half were natives of India, and the other half Europeans. We have often seen the changes effected on a European habit by a removal to a tropical or to a warm climate, but not, till now, the changes in the constitution of an Asiatic army brought to a cold climate: for such were the bleak shores of the Mediterranean to the feeble Indian. The following Sketches I have divided into three parts. The first gives the medical history, or rather the journal, of the expedition: in the second, after attempting to assign the causes of the diseases which prevailed, some modes of prevention are offered: and in the third there is some account of the diseases. The first division of the army intended for the expedition to Egypt, under Colonel Murray, sailed from Bombay in January, 1801. Their voyage was rather a tedious one, and the small-pox and a remittent fever broke out among them. They touched for refreshments at Mocha and at Jedda, and on the 16th May, 1801, came to anchor in Kossier-bay; the prevailing winds in the Red Sea, at this time, rendering it impossible to get so far up as Suez. The second division of troops, (originally intended for another service,) under Colonel Beresford, sailed from Point de Galle, in Ceylon, on the 19th February; and on the 19th May disembarked at Kossier. The last division, under Colonel Ramsay, sailed from Trincomalée, in Ceylon. They were later of arriving at Kossier, and were not able to cross the desert before July. At Kossier there is a fort and a town, if they deserve the name. They are built of mud, and the Arabs inhabit them only at the season when caravans arrive with the pilgrims for Mecca, and with corn for that and the other ports on the opposite Arabian coast. Like every other place described by Mr Bruce, that we have seen, we found Kossier most accurately laid down by that traveller in lat. 26° 7″, and long. 34. 04. Kossier is situated on the western coast of the Red Sea. Here, vessels for the expedition were daily arriving, and the troops in general landed in a very healthy condition. In one column of an annexed table, intended to show the diseases and mortality of the army, will be seen the strength of the different corps employed in that service. JUNE, 1801. At the beginning of this month we were in camp near the village of Kossier. Soon after the arrival of the troops at Kossier, all were attacked with a diarrhœa, occasioned by the water, which contained much sulphate of magnesia. At first it greatly debilitated the men; but, as they became used to it, the water ceased to affect the bowels. On the whole it appeared to have produced salutary effects, and the army was, for some time, uncommonly healthy.