Ætna lies the highest of any part of Catana, and participates the most in the inconveniences occasioned by the mouths of the volcano, for the streams of lava flowing down in Catanæa[2270] pass through it first. It was here that Amphinomus [CAS. 269] and Anapias set the example of filial piety so greatly celebrated, for they, seizing their parents, carried them on their shoulders[2271] to a place of safety from the impending ruin; for whenever, as Posidonius relates, there is an eruption of the mountain the fields of the Catanæans are buried to a great depth. However, after the burning ashes have occasioned a temporary damage, they fertilize the country for future seasons, and render the soil good for the vine and very strong for other produce, the neighbouring districts not being equally adapted to the produce of wine. They say that the roots which the districts covered with these ashes produce, are so good for fattening sheep, that they are sometimes suffocated, wherefore they bleed them in the ear every four or five days,[2272] in the same way as we have related a like practice at Erythia. When the stream of lava cools[2273] it covers the surface of the earth with stone to a considerable depth, so that those who wish to uncover the original surface are obliged to hew away the stone as in a quarry. For the stone is liquefied in the craters and then thrown up. That which is cast forth from the top is like a black moist clay and flows down the hill-sides, then congealing it becomes mill-stone, preserving the same colour it had while fluid. The ashes of the stones which are burnt are like what would be produced by wood, and as rue thrives on wood ashes, so there is probably some quality in the ashes of Ætna which is appropriate to the vine.