Dear Sir,-- ... The London Times of Wednesday, January 3, 1877, contains views on the projected congress of the so-called Americanists, that is expected to be held at Luxembourg in September next. Was the writing intended for a damper? If so, it did not miss its aim. It must have frozen to the very core the enthusiasm of the many dreamers and speculators on the prehistoric nations that inhabited this western continent. As for me, I felt its chill even under the burning rays of the tropical sun of Yucatan, notwithstanding I am, or ought to be, well inured to them during the four years that my wife and myself are rambling among the ruined cities of the Mayas. True, I am but a cool searcher of the stupendous monuments of the mighty races that are no more, but have left the history of their passage on earth written on the stones of the palaces of their rulers, upon the temples of their gods. The glowing fires of enthusiasm do not overheat my imagination, even if the handiwork of the ancient artists and architects--if the science of the Itza _H-Menes_--wise men, fill my heart with a surprise akin to admiration. Since four years we ask the stones to disclose the secrets they conceal. The portraits of the ancient kings, those of the men with long beards, who seem to have held high offices among these people, have become familiarized with us, and we with them. At times they appear to our eyes to be not quite devoid of life, not entirely deaf to our voice. Not unfrequently the meaning of some sculpture, of some character, of some painting,--till then obscure, unintelligible, puzzling,--all of a sudden becomes clear, easy to understand, full of meaning.