The yoke was fastened with a thong, formed of the bark of a cornel tree, so artificially that no eye could discover either end; and rumour was become popular of an oracle, which declared that whosoever loosened that thong would be lord of Asia. The extensive credit which this rumour had obtained, and the reported failure of the attempts of many great men, gave an importance to it. Alexander, in the progress of his campaign in Asia, arrived at Gordium, and of course visited the castle in which was preserved the Gordian knot. While, with many around, he was admiring it, the observation occurred that it being his purpose to become lord of Asia, he should, for the sake of popular opinion, have the credit of loosening the yoke. Some writers have reported that he cut the knot with his sword; but Aristobulus, who, as one of his generals, is likely to have been present, related that he wrested the pin from the beam, and so, taking off the yoke, said that was enough for him to be lord of Asia. Thunder and lightning on the following night, says Arrian, confirmed the assertion that Alexander had effected what the oracle had declared was to be done only by one who should be lord of Asia. Accordingly on the morrow he performed a magnificent thanksgiving sacrifice, in acknowledgment of the favour of the gods, thus promised: a measure as full of policy as devotion. In Cornwall are to be found enormous piles of stone, which bear the name of Ambrosian, Logan, or Rocking Stones. Structures of this kind, as they may, perhaps, reasonably be called, are of very great antiquity, being represented on medals of Tyre. They appear to have been composed of cones of rock let into the ground, with other stones adapted to their points, and so nicely balanced, that the wind could move them; and yet so ponderous, that no human force, unaided by machinery, could displace them. The figures of Apollo Didymus, on the Syrian coins, are placed sitting on the point of the cone, on which the more rude and primitive symbol of the Logan stone is found poised; and we are told, that the oracle of the god near Miletus existed before the emigration of the Ionian colonies, more than eleven hundred years before Christ. Pliny, in his second book, relates that there was one to be seen at Harpasa in Asia, exactly answering the description of those found in Cornwall. “Lay one finger on it, and it will stir; but thrust against it with your whole body, and it will not move.” Hephæstion mentions the Gigonian stone, near the ocean, which may be moved with the stalk of an asphodel, but cannot be removed by any force. Several of these stones may be seen in the neighbourhood of Heliopolis, or Baalbeck, in Syria; and one in particular has been seen in motion by the force of the wind alone.