We had intended to embody some remarks upon the pretended journey of Caillié; but we find we have already occupied too much space in details necessary to make the geographical nature of the question well understood; and we shall content ourselves with remarking, that the discovery of the termination of the Quorra, or Niger, tends to throw a degree of improbability upon the narrative of that individual, which it will require much ingenuity to explain away. It is certain that the latitude given to Timbuctoo by the editor of those travels, and upon which sufficient ridicule has already been thrown in the Edinburgh Geographical Journal, may be considered as an error entirely of the editor's, who, by taking it upon himself, will relieve the burden of the mistake from the traveller, and thus lighten the weighty doubts which might in consequence bear upon the remainder of the details; for the situation of that city, as given by Jomard, is quite inconsistent with the situation it must be in, from the ascertained source, direction, and termination of the river. There can be no doubt but that a portion of the labours presented to the public as the travels of Caillié are founded upon valid documents, wherever obtained, and probably most of the errors are those of the editor. But though authorities can be found in support of the division of the Quorra into two branches; one of which, the Joliba, flows to the north-west, and the other in an almost opposite direction,--fact which has no analogy in geography, and, what is better, no existence in nature; yet no authority can be found for placing Timbuctoo on a river flowing north from the Niger. The details which will be given to us by the results of this successful expedition will, then, not only be of assistance in allying the existing condition of things with the knowledge of the ancients, but it will enable us to reduce to a few facts the many contradictory statements which have originated in the variety of the sources of information, and the individual and national rivalry which the interest of the question gave birth to among the geographers of the present day. It will also be of importance, as it was connected with a great question, as to the possibility of a large river traversing an extensive continent, or losing itself in a marsh or lake, or being buried in the extensive sands of the desert. By laying open the interior of Africa to us, it will increase our political strength and commercial advantages on those coasts;--it will enable us to put into practice an amelioration long contemplated by Mr. Barrow, in the choice of our settlements on those coasts;--it will place the greatest and most important vent of the barbarous and inhuman traffic of negroes in our possession; and it will enable us to diffuse the benefits of superior intelligence among an ignorant and suffering people.--Literary Gazette. * * * * * SPIRIT OF THE PUBLIC JOURNALS. DISAGREEABLES.