438 VARIOUS LETTEIIS and I must add, that I always have fell, and still feel confident, that in proportion as we shall become more acquainted with the interior of this unexplored continent, my account will be so much the more authenticated : my confidence in this opinion, (however dogmatical it may appear,) is founded on the original and intelligent sources of my information ; on a long residence and general acquaintance with all the principal inhabitants of West Barbary, whose connections lay in Sudan, and at Timbuctoo ; in a competent knowledge and practical acquaintance with the languages of North Africa, and a consequent ability to discriminate the accuracy of the sources of my intelligence.

This being premised, I now proceed to offer to the public my animadversions on the above quotation from the Journal of Science and the Arts.

I have actually crossed the Wed Sebu, or the River Sebu, alluded to in the above quotation, which passes through the Berebber Kabyl of Zimure Shelleh ; I have crossed the same river several times at the city of Mequinez, and also at Meheduma, where it enters the Atlantic Ocean, in lat. 84° 15' north, and from this experimental knowledge of the course of that river, I can affirm, with confidence, that it is not inaccurately laid down in my map of West Barbary % and that it is not three hundred English miles from Fas, but only six English miles from * For which see page 55'