2. The causes which contributed to render Egypt thus early a civilized state, may be found in the natural features of the country, and its favourable situation, when compared with the rest of Africa. It is the only tract in all northern Africa situated on a large uninterrupted navigable stream: had it not been for this, it would, like the other parts of Africa under the same parallel, have been a mere desert. To this must be added two extraordinary circumstances: on the one hand, the overflowing of the river so perfectly prepares the soil, that to scatter the seed is almost the only labour of the husbandman; and yet, on the other hand, so many obstacles impede the progress of agriculture, (by the necessity of canals, dams, etc.) that the invention of man must necessarily have been awakened. When agriculture, and the kind of knowledge requisite for its ulterior development had introduced a certain degree of civilization into Egypt, the situation of that country, between Asia and Africa, and in the neighbourhood of the rich land of gold and spices, must have been highly favourable to the purposes of international commerce; hence Egypt appears in all ages to have been one of the chief seats of the inland or caravan trade. 3. It is obvious, therefore, that in the fertile valley of the Nile, the course of things must have been very different from what it was in the desert of Libya. Several small states appear to have been formed in this valley long before the existence of any great Egyptian kingdom. Their origin, as might naturally be supposed, is enveloped in an obscurity, which history can no longer entirely penetrate. It may still, however, be gathered from monuments and records, that Upper Egypt was first the seat of civilization; which, originating in the south, spread by the settlement of colonies towards the north. It is probable that this took place in consequence of the migration of some tribe, differing from the negroes, as is proved by the representations, both in sculpture and in painting, found on the yet remaining monuments of Egypt. 4. The records of the high antiquity of political civilization, not only in India, but likewise in Arabia Felix and Ethiopia, particularly in Meroe, and the evident vestiges of ancient intercourse between the southern nations of our globe, prove with sufficient evidence the truth of such migrations, although they cannot be chronologically determined. It is certain, however, that religion had no small share in producing them. The national bond of union in Egypt not only continued in later times, entirely dependent upon religion, but was originally grounded upon it. Thus every step in political civilization must have depended, if not solely, at least principally, on the caste of priests and on their extension.