^{page 385 note 1} Some remarkable MSS. lately translated by the Abbé Brasseur de Bourbourg, the Codex Chimalpopoca and the Codex Troano, mention not only the existence of a subterranean river under the Rocky Mountains, but also the destruction of the territory to the east of the present Republic of Mexico. These latter have, however, only recently been brought to light, and are not the sources whence Mr. Catlin obtained his information. Mr. L. Harper, Professor of Geology, U.S.A., in a letter to the Editor of the “Echo du Parlement,” adduced a fact in confirmation of Mr. Catlin’s theory, viz.: that a subterranean outlet of the Great Salt Lake has been discovered at Corinne, in the territory of Utah, U.S., which he thinks may largely contribute to the Gulf Stream.