s CHRONICLE OF THE sAGAjx. defence. Then Harald hit upon an expedient. He made his bird-catchers catch the small birds which had their nests within the castle, but flew into the woods by day to get food for their young. He had small splinters of tarred wood bound upon the backs of the birds, smeared these over with wax and sulphur, and set fire to them. As soon as the birds were let loose they all flew at once to the castle to their young, and to their nests, which they had under the house roofs that were covered with reeds or straw. The fire from the birds seized upon the house roofs ; and although each bird could only carry a small burden of fire, yet all at once there was a mighty flame, caused by so many birds carrying fire with them and spreading it widely among the house roofs. Thus one house after the other was set on fire, until the castle itself was in flames. Then the people came out of the castle and begged for mercy ; the same men who for many days had set at defiance the Greek army and its leader. Harald granted life and safety to all who asked quarter, and made himself master of the place. Chapter Thcrc was auothcr castle before which Harald had BatTi^^at ^^'^Q with his army. This castle was both full of another pcoplc, aud SO stroug that there was no hope of break- ing into it. The castle stood upon a flat hard plain. Then Harald undertook to dig a passage from a place where a stream ran in a bed so deep that it could not be seen from the castle. They threw out all the earth into the stream, to be carried away by the water. At this work they laboured day and night, and relieved each other in gangs ; while the rest of the army went the whole day against the castle, where the castle people shot through their loop-holes. They shot at each other all day in this way, and at night they slept on both sides. Now when Harald perceived that his underground passage was so long that it must be within the castle walls, he ordered his castle.
