They had great skill in the art of working metals, especially gold and silver. Besides these precious metals, they had copper, tin, lead, and quicksilver. Figures 65 and 66 show some of the implements used by the Peruvians. Iron was unknown to them in the time of the Incas, although some maintain that they had it in the previous ages, to which belong the ruins at Lake Titicaca. Iron ore was and still is very abundant in Peru. It is impossible to conceive how the Peruvians were able to cut and work stone in such a masterly way, or to construct their great roads and aqueducts without the use of iron tools. Some of the languages of the country, and perhaps all, had names for iron; in official Peruvian it was called _quillay_, and in the old Chilian tongue _panilic_. “It is remarkable,” observes Molina, “that iron, which has been thought unknown to the ancient Americans, has particular names in some of their tongues.” It is not easy to understand why they had names for this metal, if they never at any time had knowledge of the metal itself. In the Mercurio Peruano, tome i., p. 201, 1791, it is stated that, anciently, the Peruvian sovereigns “worked magnificent iron mines at Ancoriames, on the west shore of Lake Titicaca;” but I can not give the evidence used in support of this statement. [Illustration: Fig. 65.--Copper Knives.] [Illustration: Fig. 66.--Copper Tweezers.] Their goldsmiths and silversmiths had attained very great proficiency. They could melt the metals in furnaces, cast them in moulds made of clay and gypsum, hammer their work with remarkable dexterity, inlay it, and solder it with great perfection. The gold and silver work of these artists was extremely abundant in the country at the time of the Conquest, but Spanish greed had it all melted for coinage. It was with articles of this gold-work that the Inca Atahuallpa filled a room in his vain endeavor to purchase release from captivity. One of the old chroniclers mentions “statuary, jars, vases, and every species of vessels, all of fine gold.” Describing one of the palaces, he said: “They had an artificial garden, the soil of which was made of small pieces of fine gold, and this was artificially sowed with different kinds of maize which were of gold, their stems, leaves, and ears. Besides this, they had more than twenty sheep (llamas), with their lambs, attended by shepherds, all made of gold.” This may be the same artificial garden which was mentioned by Francisco Lopez de Gomara, who places it on “an island near Puna.” Similar gardens of gold are mentioned by others. It is believed that a large quantity of Peruvian gold-work was thrown into Lake Titicaca to keep it from the Spanish robbers. In a description of one lot of golden articles sent to Spain in 1534 by Pizarro, there is mention of “four llamas, ten statues of women of full size, and a cistern of gold so curious that it incited the wonder of all.”