This most simple mode of covering over a void space with stone, when single blocks of sufficient size could not be employed, would suggest itself to the most barbarous as well as to the most refined people. Indeed, in a mound lately opened in the Ohio Valley, two circular chambers were discovered, and are still preserved, the walls being made of logs, and the roofs formed by overlapping stones rising to a point, on precisely the same plan as the Treasury of Atreus at Mycenae, and the chamber at Orchomenus, built by Minyas, king of B[oe]otia. No inference as to common origin or international communication can with safety be drawn from such coincidences, or from any supposed coincidence between the pyramidal structures of this Continent and those of Egypt, for no agreement exists, except that both are called pyramids. [Engraving 54: Arch used by the ancient American Builders] In the Egyptian Pyramids the sides are of equal lengths, and, with one exception (Saccara), composed of straight lines, which is not the case with any pyramid of the American Continent. The sides are never equal, are frequently composed of curves and straight lines, and in no instance form a sharp apex. * * * * * VESTIGIA PHALLICAE RELIGIONIS PROUT QUIBUSDAM MONUMENTIS AMERICANIS INDICANTUR.--(_Vid. tom._ i., _pag._ 181.) Haec monumenta ex undecim Phallis constant, omnibus plus minusve fractis, undique dispersis, atque solo semiobrutis, duoram circiter vel trium pedum mensuram habentibus. Non ea nosmetipsi reperimus neque illis hanc Phallicam naturam attribuimus; nobis autem, has regiones ante pererrantibus, haec eadem monumenta Indi ostenderunt, quodam nomine appellantes lingua ipsorum eandem vim habente, ac supra dedimus. Quibus auditis, haec Phallicae religionis, his etiam in terris, vestigia putanda esse tunc primum judicavimus. Monumenta attamen de quibus huc usque locuti sumus, non, ut bene sciunt eruditi, libidinem denotant, sed potius, quod memoria dignissimum, nostra etiam continente vis genitalis cultum, omnibus paene antiquis Europae Asiaeque nationibus communem, per symbola nota olim viguisse. Quam autem cognationem hic Phalloram cultus his populis cum Americae aboriginibus indicare videatur, non nostrum est, qui visa tantum vel audita litteris mandamus, his paginis exponere. * * * * * ANCIENT CHRONOLOGY OF YUCATAN; OR, A TRUE EXPOSITION OF THE METHOD USED BY THE INDIANS FOR COMPUTING TIME.--_Translated from the Manuscript of Dan Juan Pio Perez, Gefe Politico of Peto, Yucatan._ 1 deg.. _Origin of the Period of_ 13 _Days_ (_triadecateridas_).