"The parties nearest to Huntingdon should be always vigilant, and day and night keep men at the edge of the swamp to watch the doings of the Romans, and should send notice to me every day or two as to what the enemy are doing, and when they are likely to advance. Should they come suddenly, remember that it is of no use to try to oppose their passage down the river. Their boats will be far stronger than ours, and we should but throw away our lives by fighting them there. They may go right down to the sea if they please, but directly they land or attempt to thrust their boats up the channels through the swamp, then every foot must be contested. They must be shot down from the bushes, enticed into swamps, and overwhelmed with missiles. Let each man make himself a powerful bow and a great sheath of arrows pointed with flints or flakes of stone, which must be fetched from the dry land, although even without these they will fly straight enough if shot from the bushes at a few yards' distance. "Let the men practice with these, and remember that they must aim at the legs of the Romans. It is useless to shoot at either shields or armour. Besides, let each man make himself a spear, strong, heavy, and fully eighteen feet long, with the point hardened in the fire, and rely upon these rather than upon your swords to check their progress. Whenever you find broad paths of firm ground across the swamps, cut down trees and bushes to form stout barriers. "Make friends with the Fenmen. Be liberal to them with gifts, and do not attempt to plant parties near them, for this would disturb their wildfowl and lead to jealousy and quarrels. However well you may learn the swamps, they know them better, and were they hostile might lead the Romans into our midst. In some parts you may not find dry land on which to build huts; in that case choose spots where the trees are stout, lash saplings between these and build your huts upon them so as to be three or four feet above the wet soil. Some of my people who know the swamps by the eastern rivers tell me that this is the best way to avoid the fen fevers." Having seen that everything was arranged, Beric and his party returned to their camp. For some time the reports from the upper river stated that the Romans were doing little beyond sending out strong parties to cut timber. Then came the news that a whole legion had arrived, and that small forts containing some two hundred men each were being erected, three or four miles apart, on both sides of the Fen. "That shows that all resistance must have ceased elsewhere," Aska said, "or they would never be able to spare so great a force as a legion and a half against us. I suppose that these forts are being built to prevent our obtaining cattle, and that they hope to starve us out. They will hardly succeed in that, for the rivers and channels swarm with fish, and now that winter is coming on they will abound with wildfowl."