their buildings chiefly in Europe and Asia, and their huge blocks of stone were worked so nicely that they fitted together without mortar.  Treryn Castle was the stronghold of a giant who was stronger than most of the other giants who lived in those parts, and was, in addition, a necromancer or sorcerer, in communication with the spirits of the dead, by whose aid he raised this castle by enchantment from the depths of the sea.  It was therefore an enchanted castle, and was kept in its position by a spell, a magic key, which the giant placed in a hole in a rock on the seacoast, still named the Giant’s Lock.  Whenever this key, which was a large round stone, could be taken out of the lock, the castle and the promontory on which it stood would disappear beneath the sea to the place from whence it came.  Very few people had seen the key, because its hiding-place was in such a very dangerous position that scarcely any one was courageous enough to venture to the lock that held it.  To reach the lock it was necessary to wait for a low tide, and then to walk along a ledge in the side of the rock scarcely wide enough for the passage of a small animal, where in the event of a false step the wanderer would be certain to be dashed to pieces on the rocks below.  At the end of this dangerous path there was a sharp projecting rock in which was a hole wide enough for a man’s hand and arm to pass down, and at the bottom of the hole he could feel a rather large but smooth stone in the shape of an egg, which he could easily move in any direction.  Then all he had to do further was to draw it out through the hole; but the difficulty was that the stone was larger than the aperture, and the mystery was who placed it there.

[Illustration:  ROCKS NEAR LAND’S END.]

The dangerous nature of the approach, in addition to the difficulty of getting back again, was quite sufficient to deter any of us from making the attempt; even if we gained possession of the magic key we might have been taken, with it and the castle and promontory, to the enchanted regions below, so we decided to refrain, for after all there was the desirability of reaching home again!

It was a very wild place, and the great rocks and boulders were strongly suggestive of giants; but our friend would not have us linger, as we must go to see the famous Logan Rock.  In order to save time and risk, he suggested that we should secure the services of a professional guide.  We could see neither guides nor houses, and it looked like a forlorn hope to try to find either, but, asking us to stay where we were until he came back, our friend disappeared; and some time afterwards he reappeared from some unknown place, accompanied by an intelligent sailorlike man whom he introduced to us as the guide.  The guide led us by intricate ways over stone walls, stepped on either side with projecting stones to do duty as stiles, and once or twice we walked along the top of the walls themselves, where they were broad enough to support a footpath.  Finally we crossed what appeared to be a boundary fence, and immediately afterwards found ourselves amongst a wilderness of stones and gigantic boulders, with the roar of the waves as they beat on the rocks below to keep us company.