"Mr. Park is of opinion, that when your Lordship shall have duly weighed the above reasons, you will be induced to conclude that his hopes of returning by the Congo are not altogether fanciful; and that his expedition, though attended with extreme danger, promises to be productive of the utmost advantage to Great Britain. "Considered in a commercial point of view, it is second only to the discovery of the Cape of Good Hope; and in a geographical point of view, it is certainly the greatest discovery that remains to be made in this world. "(Signed) MUNGO PARK." The circumstance most deserving of attention in this Memoir, is the opinion expressed respecting the course and termination of the Niger; a geographical question of great difficulty and importance. In a treatise written by Major Rennell expressly on the discoveries of Park, that distinguished geographer, on comparing the various accounts of the progress of the Niger beyond Houssa, had given a distinct opinion that its waters had no communication either with the river Nile or the Sea; but were spread out into a great lake in Wangara and Ghana, and were evaporated by the heat of the sun. [Footnote: Proceedings of African Association, vol. i. p. 533.] Park's attention had of course been much directed to the same subject; and he had omitted no opportunity of collecting information which might throw light on this obscure and difficult question. During his residence in Scotland he had become acquainted with a Mr. George Maxwell, formerly an African trader, who had a great knowledge of the whole western coast of Africa, especially south of the equator, and had published a chart of the river Congo. Before Mr. Maxwell had heard any particulars of the Niger, many circumstances had induced him to conjecture that the source of the Congo lay considerably inland, and very far to the north. The publication of Park's Travels confirmed him in his opinion, and led him to conclude that the Congo and the Niger were one and the same stream. Mr. Maxwell's reasonings appear to have produced a great impression upon Park, who adopted his sentiments relative to the termination of the Niger in their utmost extent, and persevered in that opinion to the end of his life.