Note 38 — Chapter XVIII · GROUND STONE—PROBLEMATICAL FORMS
Reading edition
Knight of Elvas, loc. cit., p. 144. Cf. Garcilaso de la Vega, I, pp. 424, 434; and in vol. II, pp. 5 et seq., there is an account of the way in which the Indians extracted pearls from shells; Paris, 1670.