I. THE MANUFACTURE OF OBSIDIAN KNIVES, ETC. ( Note to p. 97. )
Some of the old Spanish writers on Mexico give a tolerably full account of the manner in which the obsidian knives, &c., were made by the Aztecs. It will be seen that it only modifies in one particular the theory we had formed by mere inspection as to the way in which these objects were made, which is given at p.97; that is, they were cracked off by pressure, and not, as we conjectured, by a blow of some hard substance.
Torquemada (Monarquía Indiana, Seville, 1615) says; (free translation)
“They had, and still have, workmen who make knives of a certain black stone or flint, which it is a most wonderful and admirable thing to see them make out of the stone; and the ingenuity which invented this art is much to be praised. They are made and got out of the stone (if one can explain it) in this manner. One of these Indian workmen sits down upon the ground, and takes a piece of this black stone, which is like jet, and hard as flint, and is a stone which might be called precious, more beautiful and brilliant than alabaster or jasper, so much so that of it are made tablets1 and mirrors. The piece they take is about 8 inches long or rather more, and as thick as one’s leg or rather less, and cylindrical; they have a stick as large as the shaft of a lance, and 3 cubits or rather more in length; and at the end of it they fasten firmly another piece of wood, 8 inches long, to give more weight to this part; then, pressing their naked feet together, they hold the stone as with a pair of pincers or the vice of a carpenter’s bench. They take the stick (which is cut off smooth at the end) with both hands, and set it well home against the edge of the front of the stone (y ponenlo avesar con el canto de la frente de la piedra) which also is