516 VARIOUS LETTERS.

report received by Mr. Xackson, of a person (several Negroes", it should be) having performed a voyage by water from Timbuctoo to Cairo," I cannot but observe with astonishment, that the Reviewer believes Burckhardt's report, that they are the same river, when, at the same time he does not believe mine.

Is there not an inconsistency here, somewhat incompatible with the impartiality which ought to regulate the works of criticism ? I will not for a moment suppose it to have proceeded from a spirit of animosity, which I feel myself unconscious of deserving. But the reviewer further says, the objection to the identity of the Niger and the Nile, is grounded on the incongruity of their periodical inundations, or on the rise and fall of the former river not corresponding with that of the latter. I do not comprehend whence the Quarterly Reviewer has derived this information ; I have always understood the direct contrary, which I have declared in the enlarged editions of my account of Marocco, page 304, which has been confirmed by a most intelligent African traveller, Ali Bey, (for which see his travels, page 220.)

I may be allowed to observe, that although the Quarterly Reviewer has changed his opinion on this matter, I have invariably maintained mine, founded as it is on the concurrent testimony of the best informed and most intelligent native African travellers, and 1 Mill assert, on r'ce Jackson's enlarged Account of Marocco, p. 312.