The brothers Euryalus and Hyperbius[1375] were the first who constructed brick-kilns and houses at Athens; before which, caves in the ground served for houses. Gellius[1376] is inclined to think that Toxius, the son of Cælus, was the first inventor of mortar, it having been suggested to him by the nest of the swallow. Cecrops[1377] gave to a town the name of Cecropia, after himself; this is now the citadel of Athens. Some persons will have it, that Argos had been founded before this period by King Phoroneus; others, again, that Sicyon had been previously built; while the Egyptians declare that their own city, Diospolis, had been in existence long before them. Cinyra,[1378] the son of Agriopas,[1379] invented tiles and discovered copper-mines,[1380] both of them in the island of Cyprus; he also invented the tongs, the hammer, the lever, and the anvil. Wells were invented by Danaus,[1381] who came from Egypt into that part of Greece which had been previously known as Argos Dipsion. The first stone-quarries were opened by Cadmus at Thebes, or else, according to Theophrastus, in Phœnicia. Walls were first built by Thrason;[1382] according to Aristotle, towers were first erected by the Cyclopes,[1383] but according to Theophrastus, by the Tirynthii. The Egyptians invented weaving;[1384] the Lydians of Sardis the art of dyeing wool.[1385] Closter, the son of Arachne, invented the spindle for spinning wool;[1386] Arachne herself, linen cloth and nets;[1387] Nicias of Megara, the art of fulling cloth;[1388] and Tychius, the Bœotian, the art of making shoes.[1389] The Egyptians will have it that the medical art was first discovered among them, while others attribute it to Arabus, the son of Babylonis and Apollo; botany and pharmacy are ascribed to Chiron, the son of Saturn and Philyra.[1390]