One of the Mexican myths of the birth of Quetzalcoatl narrates that his mother, Chimalma, while sweeping, found a chalchihuitl, swallowed it, and became pregnant: "Andando barriendo la dicha Chimalma halló un chalchihuitl, (que es una pedrezuela verde) y que la tragó y de esto se empreñó, y que así parió al dicho Quetzalcoatl."[727] The same author tells us that the chalchihuitl (which he calls "pedrezuela verde") are mentioned in the earliest myths of the Mexicans.[728] In South America the emerald seems to have taken the place of the chalchihuitl. Bollaert[729] makes frequent mention of the use of the emerald by the natives of Ecuador and Peru, "a drilled emerald, such as the Incas wore;" "large emeralds, emblematic of their [the Incas'] sovereignty." From Torquemada we learn that the Mexicans adorned their idols with the chalchihuitl, and also that they buried a chalchihuitl with their dead, saying that it was the dead man's heart.[730] "Whenever rain comes the Indians [Pima and Maricopa] resort to these old houses [ruins] to look for trinkets of shells, and a peculiar green stone."[731] The idols which the people of Yucatan gave to Juan de Grijalva in 1518 were covered with these stones, "cubierta de pedrecicas."[732] Among the first presents made to Cortes in Tabasco were "unas turquesas de poco valor."[733] The fact that the Mexicans buried a "gem" with the bodies of their dead is mentioned by Squier, but he says it was when the body was cremated.[734] The people of Cibola are said to have offered in sacrifice to their fountains "algunas turquesas que las tienen, aunque ruines."[735] "Turquesas" were given to the Spaniards under Coronado by the people of the pueblo of Acoma.[736] "The Mexicans were accustomed to say that at one time all men have been stones, and that at last they would all return to stones; and, acting literally on this conviction, they interred with the bones of the dead a small green stone, which was called the principle of life."[737] The great value set upon the chalchihuitl by the Aztecs is alluded to by Bernal Diaz, who was with the expedition of Grijalva to Yucatan before he joined that of Cortes to Mexico.[738] Diaz says that Montezuma sent to Charles V, as a present "a few chalchihuis of such enormous value that I would not consent to give them to any one save to such a powerful emperor as yours."[739] These stones were put "in the mouth of the distinguished chiefs who died."[740] [Illustration: APACHE MEDICINE SHIRT. Plate VII.]