We do not find in the ruins of Cannar those stones of enormous size, which we see in the Peruvian edifices of Cuzco and the neighbouring countries. Asocta measured some at Traquanaco, which were twelve metres (thirty-eight feet) long, five metres, eight tenths (eighteen feet) broad, and no one metre nine tenths (six feet) thick. Pedro Cieça of Leon saw some of the same dimensions in the ruins of Tiahuanaco*. In the Citadel of Cannar I saw no stones that exceeded twenty-six decimetres (eight feet) in length. They are in general much less remarkable for their bulk, than the extreme beauty of their shape; the greater part are joined without any appearance of cement. We nevertheless recognise cement in some of the buildings surrounding the citadel, and in the three houses of the Inca at Pullal, each of which is more than fifty-eight metres long. The cement is formed of a mixture of small stones and argillaceous marl, which effervesces with acids; it is a true mortar, of which I detached considerable portions with a knife, by digging into the interstices which were left between the parallel courses of the stones. This fact deserves some attention; because the travellers who preceded us have all asserted, that the Peruvians were unacquainted with the use of mortar; but the supposition, that the Peruvians were as ignorant in this point as the ancient inhabits of Egypt, is erroneous. The Peruvians not only employed a marly mortar in the great edifices of Pacaritambo*, but made use of a cement of asphaltum (betun*); a mode of construction, which on the banks of the Euphrates and the Tigris may be traced back to the remotest antiquity.