From Abbeokuta, population 110,000, we proceeded to Ijaye, population 78,000, reckoned by the white missionaries and officers of the Niger Expedition of Her Majesty's service, who passed through once, at 80,000; Oyo, population, 75,000; Ogbomoso, population 70,000; Illorin, population 120,000; returning back, _via_ Ogbomoso to Oyo: when by arrangement, Mr. Campbell leaving me at Oyo, returned to Abbeokuta by a new route through Isen and Biolorin-Pellu, small places: whence I, a week later, also by another strange route, returned, passing through Iwo, population 75,000; and Ibaddan, population 150,000 an immense city, the estimated number of inhabitants by the Civil Corps who passed through, being 250,000. It will be seen that I have made a liberal deduction of two-fifths, or 100,000 from this estimate; still, the population is immense and the city extensive, the walls embracing an outline of at least twenty-three miles. Return to Lagos From Abbeokuta, the water being very low, it was thought advisable that Mr. Campbell take charge of all our luggage, and proceed by way of the Ogun to Lagos, (he having disposed of his horse at Abbeokuta) whilst I, on horseback, with William Johnson our cook, the only servant we retained--a civilized native--as guide and attendant, proceeded by land, both reaching Lagos three days after, in the same hour of the same day. VIII TOPOGRAPHY, CLIMATE, ETC. Topography, Climate The whole face of the country extending through the Aku region or Yoruba, as it is laid down on the large missionary map of Africa, is most beautifully diversified with plains, hills, dales, mountains, and valleys, interlined with numerous streams, some of which are merely temporary or great drains; whilst the greater part are perennial, and more or less irrigating the whole year, supplying well the numerous stocks of cattle and horses with which that country is so well everywhere provided. The climate is most delightful. First Plateau and Second Plateau, or Table Lands The first plateau or low land from Lagos, extends about thirty-five or forty miles interiorly, with but occasionally, small rugged or rocky elevations breaking the surface, when it almost abruptly rises into elevated lands, undulating and frequently craggy, broken often by deep declivities of glens and dales. Soil The soil of the first plateau, for ten or fifteen miles, is moist and sandy, more or less, gradually incorporating with a dark rich earth, which, extending quite through the second plateau, continually varies in quality, consistence, and color, from a sandy loam and clay-red iron pyrite appearance to a potter's-clay, and rich alluvial color and quality, the whole being exceedingly fertile and productive; as no district through which we traveled was without cultivation more or less, and that always in a high degree, whatever the extent of ground under cultivation or the produce cultivated. Stone Formation