Tenerife, and the so-called New World, preferred the easily-cleft green-black obsidian,[140] of which the Ynkas also made their knives. The Polynesian Islands show two distinct systems of attachment. In the first the fragments, inserted into the grooved side, are either tied or made fast by gum or cement. In the second they are set in a row between two small slats or strips of wood, which, lastly, are lashed to the weapon with fibres. The points are ingeniously arranged in the opposite direction, so as to give severe cuts both in drawing and withdrawing. The Eskimos secure the teeth by pegs of wood and bone. The Pacho of the South Sea Islanders is a club studded on the inner side with shark’s teeth made fast in the same manner. The Brazilian Tapuyas armed a broad-headed club with teeth and bones sharpened at the point.[141] In ‘Flint Chips’ we find that a North American tribe used for thrusting a wooden Sword, three feet long, tipped with mussel-shell. Throughout Australia the natives provide their spears with sharp pieces of obsidian or crystal: of late years they have applied common glass,[142] a new use for waste and broken bottles (fig. 70). The fragments are arranged in a row along one side near the point, and are firmly cemented. There is no evidence of this flint-setting in Ireland: but the frequent recurrence of silex implements adapted for such purpose has suggested, as in the Iroquois graves, that the wood which held them together may have perished. We read in ‘Flint Chips’ that the Selden Manuscript shows a flake of obsidian mounted in a cleft wooden handle, the latter serving as a central support, with a mid-rib running nearly the whole length. The sole use of the weapon was for thrusting.[143] [Illustration: FIG. 63.—WOOD- AND HORN-POINTS.] [Illustration: FIG. 64.—MEXICAN SWORD OF THE FIFTEENTH CENTURY, OF IRON WOOD, WITH TEN BLADES OF BLACK OBSIDIAN FIXED INTO THE WOOD. (This weapon is twenty-five inches long.)] The people of Copan (Yucatan) opposed Hernandez de Chaves with slings, bows, and ‘wooden Swords having stone edges.’[144] In the account of the expedition sent out (1584) by Raleigh to relieve the colony of Virginia, we read of ‘flat, edged truncheons of wood,’ about a yard long. In these were inserted points of stag-horn, much in the same manner as is now practised, except that European lance-heads have taken their place. Knives, Swords, and glaives, edged with sharks’ teeth,[145] are found in the Marquesas; in Tahiti, Depeyster’s Island, Byron’s Isles, the Kingsmill Group, Redact Island,[146] the Sandwich Islands, and New Guinea. Captain Graah notices a staff edged with shark’s teeth on the cast coast of Greenland, and the same is mentioned amongst the Eskimos by the late Dr. King.[147]