When the Spaniards overran Peru, which lies on the western side of South America, on the coast of the Pacific were found statues, obelisks, mausolea, edifices, fortresses, all of stone, equal with the architecture of Egypt, Greece, and Rome, six hundred years before the Christian era. Roads were cut through the Cordillera mountains; gold, silver, copper, and lead mines, were opened and worked to a great extent; all of which is evidence of their knowledge of architecture, mineralogy, and agriculture. In many places of that country are found the ruins of noble aqueducts, some of which, says Dr. Morse, the geographer, would have been thought works of difficulty in civilized nations. Several pillars of stone are now standing, which were erected to point out the equinoxes and solstices. In their sepulchres were found paintings, vessels of gold and silver, implements of warfare, husbandry, &c. To illustrate the architectural knowledge of the Peruvians, as well as of some other provinces of South America, we quote the following from Baron Humboldt’s Researches, 1st vol. Eng. Trans., Amer. ed., p. 255:—“The remains of Peruvian architecture are scattered along the ridge of the Cordilleras, from Cuzco to Cajambe, or from the 13th degree of north latitude to the equator, a distance of nearly a thousand miles. What an empire, and what works are these, which all bear the same character in the cut of the stones, the shape of the doors to their stone buildings, the symmetrical disposal of the niches, and the total absence of exterior ornaments! This uniformity of construction is so great, that all the stations along the high road, called in that country palaces of the Incas, or kings of the Peruvians, appear to have been copied from each other; simplicity, symmetry, and solidity, were the three characters by which the Peruvian edifices were distinguished. The citadel of Cannar, and the square building surrounding it, are not constructed with the same quartz sandstone which covers the primitive slate, and the porphyries of Assuay; and which appears at the surface, in the garden of the Inca, as we descend toward the valley of Gulan; but of _trappean porphyry_, of great hardness, enclosing nitrous feldspar and hornblende. This porphyry was perhaps dug in the _great_ quarries which are found at 4000 meters in height, (which is 13,000 feet and a fraction, making two and a third miles in perpendicular height,) near the lake of Culebrilla, or Serpent lake, ten miles from Cannar. To cut the stones for the buildings of Cannar, at so great a height, and to bring them down and transport them ten miles, is equal with any of the works of the ancients, who built the cities of Pompeii, Herculaneum, and Stabia, long before the Christian era.