It appears probable that the plague originated in Egypt. From time immemorial to the present day the lower provinces have been subject to this cruel scourge. Wars, intestine commotions, and misrule have too frequently prevented the local authorities from paying proper attention to measures of public salubrity. Herodotus tells us, that when he was at Memphis, Egypt was just liberated from a long-protracted war, during which political economy had been neglected, canals had been abandoned and choked up, and the frontiers of the land were infested with banditti, while the interior was desolated by pestilential disorders. My much esteemed friend Baron Larrey, in his valuable work upon Egypt, has given a topographical description of the country; and the influence that the seasons exercise upon it, must be evident. He informs us that after the spring equinox, and especially towards the beginning of June, the southerly winds are prevalent for about fifty days. Their scorching influence is experienced for upwards of four hours, while they waft with fatal rapidity putrid emanations exhaled by animal and vegetable bodies decomposed in the lakes formed by the receding waters of the Nile. From various observations it has been concluded that the plague is both an endemic and contagious disease in Lower Egypt, but simply contagious in Upper Egypt, Syria, the other Turkish provinces, and Europe. No account of the plague in Abyssinia, Sennaar, or the interior of Africa, is given by any traveller.