In Cogolludo’s Historia de Yucatan, the similarity of ruins throughout this territory is thus alluded to: “The incontestable analogy which exists between the edifices of Palenque and the ruins of Yucatan places the latter under the same origin, although the visible progress of art which is apparent assigns different epochs for their construction.”[10-*] So we have numerous authorities for the opinion, that the ruins in Chiapas and Yucatan were built by the same or by a kindred people, though at different periods of time, and that the language which prevails among the Indian population of that region at the present day, is the same which was used by their ancestors at the time of the conquest. Captain Dupaix, who visited Yucatan in 1805, wrote a description of the ruins existing there, which was published in 1834; but it was reserved for M. Frédéric de Waldeck to call the attention of the European world to the magnificent remains of the Maya country, in his _Voyage pittoresque et archaeologique dans la province de Yucatan, pendant des années 1834-1836_, Folio, with plates, Paris, 1838. This learned centenarian became a member of the Antiquarian Society in 1839, and his death was noticed at the last meeting. Following him came the celebrated Eastern traveller, John L. Stephens, whose interesting account of his two visits to that country in 1840 and 1841, entitled _Incidents of travel in Central America, Chiapas and Yucatan_, in two volumes, and Incidents of travel in Yucatan, in two volumes, is too familiar to require particular notice at this point. It may not be uninteresting to record the fact, that Mr. Stephens’ voyages and explorations in Yucatan were made after the suggestion and with the advice of Hon. John R. Bartlett, of Providence, R. I., a member of this Society, who obtained for this traveller the copy of Waldeck’s work which he used in his journeyings. Désiré Charnay, a French traveller, published in 1863 an account entitled _Cités et Ruines Américaines_, accompanied by a valuable folio Atlas of plates.