In speaking of Tombuctoo as being still entirely unknown, the writer is aware that a particular description of that city has been given in an _Account of the Empire of Morocco_ published in the year 1809 by Mr. James Grey Jackson, who resided in that part of Africa during many years. But Mr. Jackson derived his whole knowledge of Tombuctoo from the accounts of native traders; upon whose unsupported testimony very little reliance can be placed; especially as to matters of detail, or such facts as require to be stated with any degree of exactness. Considering that Mr. Jackson's information was obtained from this source, the very minuteness and apparent precision of his account, are circumstances highly unfavourable to its authenticity. With reference to the internal geography of Africa, the writer may take this opportunity of observing, that next to the African Association, to whom we are indebted for almost all the authentic information which we possess upon this subject, [Footnote: The valuable discoveries of the late Mr. Browne (whose death must be lamented as a public loss) form an exception to this general remark; but perhaps the only exception.] considerable praise is due to the Sierra Leone Company; under whose auspices, during the time they were in possession of that colony, several important journies into the interior were judiciously undertaken and successfully executed. Among these may be mentioned an expedition in 1794 by Mr. Watt and Mr. Winterbottom (being a land journey of near five hundred miles, in going and returning by different routes) to Laby and Teembo, both of them considerable towns, and the latter the capital of the Foulah country. Tombuctoo appeared, from the enquiries made by the travellers, to be well known at both those places; and the communication with that city from Laby, though it was spoken of as a journey of four moons, was represented to be open, and they were furnished with many particulars of the route. Shortly afterwards, in consequence perhaps of this information, a project was formed at Sierra Leone of sending out a mission to Tombuctoo; but Mr. Watt, who was to have undertaken the journey, died; and the invasion of the colony by the French in September 1794, together with the destruction which followed, seems to have put a stop to expeditions of this nature.