ON the 2d of July, 1861, I sailed from New York City on a little brig, the "Ocean Eagle," with destination to the island of Corisco, near the equator, on the West Coast of Africa. My first introduction to the natives of Africa was a month later, when the vessel stopped at Monrovia, the capital of the Liberian Republic, to land a portion of its trade goods, and at Other ports of Liberia, Sinoe, and Cape Palmas; thence to Corisco on September 12. Corisco is a microcosm, only five miles long by three miles wide; its surface diversified with every variety of landscape, proportioned to its size, of hill, prairie, stream, and lake. It is located in the eye of the elephant-head shaped Bay of Corisco, and from twelve to twenty miles distant from the mainland. Into the bay flow two large rivers,--the Muni (the Rio D'Angra of commerce) and the Munda (this latter representing the elephant's proboscis).