The Tezcucans (or Acolhuans) belonged to the same race as the Aztecs, whom they greatly surpassed in knowledge and social refinement. Nezahualcoyotl, a wise monarch of the Tezcucans, abhorred human sacrifices, and erected a large temple which he dedicated to “The unknown god, the cause of causes.” This edifice had a tower nine storeys high, on the top of which were placed a number of musical instruments of various kinds which were used to summon the worshippers to prayer. Respecting these instruments especial mention is made of a sonorous metal which was struck with a mallet. This is stated in a historical essay written by Ixtlilxochitl, a native of Mexico and of royal descent, who lived in the beginning of the seventeenth century, and who may be supposed to have been familiar with the musical practices of his countrymen. But whether the sonorous metal alluded to was a gong or a bell is not clear from the vague record transmitted to us. That the bell was known to the Peruvians appears to be no longer doubtful, since a small copper specimen has been found in one of the old Peruvian tombs. This interesting relic is now deposited in the museum at Lima. M. de Castelnau has published a drawing of it. The Peruvians called their bells _chanrares_; but it remains questionable whether this name did not designate rather the so-called horse bells, which were certainly known to the Mexicans, who called them _yotl_. It is noteworthy that these _yotl_ are found figured in the picture-writings representing the various objects which the Aztecs used to pay as tribute to their sovereigns. The collection of Mexican antiquities in the British Museum contains a cluster of yotl-bells. Being nearly round, they closely resemble the _Schellen_ which the Germans are in the habit of affixing to their horses, particularly in the winter when they are driving their noiseless sledges.