As far as Europeans are concerned, climates like the one we have just described cannot be considered as unhealthy; they debilitate and weaken the system, and predispose to tropical diseases, but seldom engender them. I expected to find many cases of scurvy, due to the brackish condition of the water and to the absence of vegetables; but either scurvy did not exist to a great extent or did not come under my observation, as during my stay I did not meet with more than three or four cases. Fevers affect the natives after a fall of rain, but though some cases are of a very pernicious type, the majority belong to the simple intermittent or remittent, and yield rapidly to a proper treatment. Small-pox now and then makes fearful ravages. When it breaks out, a mild case is chosen, and from it a great many are inoculated. The mortality is considerable amongst those who submit to the operation. On several occasions during the summer I received vaccine lymph, and inoculated with it. In no case did it take; owing, I suppose, to the extreme heat of the weather. During, the cold season I applied again, but could not obtain any. The greatest mortality is due to childbirth--a strange fact, as in the East confinements are generally easy. The practice in use here has probably much to do with this unfavourable result. After her confinement the woman is placed upon an alga or small native bed; underneath which, fire with aromatic herbs is so arranged as almost to suffocate the newly-delivered woman. Diarrhoea was frequent during the summer of 1865, and dysentery at the same period proved fatal to many. Diseases of the eyes are seldom met with, except simple inflammation caused by the heat and glare of the sun. I suffered from a severe attack of ophthalmia, and was obliged in consequence to proceed to Aden for a few weeks. I have met with no case of disease of the lungs, and bronchial affections seem almost unknown. I had occasion to attend upon cases of neuralgia, and one of gouty rheumatism.