"It is, above all things," he said, "necessary that we should have some place where we can place the women and children in case of invasion and where we can ourselves retire in extreme necessity. Therefore I propose that we shall build a fort of sufficient size to contain all the inhabitants of the district, with many flocks and herds. My cousin Egbert has ridden far over the country, and recommends that the Roman fortification at Moorcaster shall be utilized. It is large in extent, and has a double circle of earthen banks. These differ from those which we are wont to build, since we Saxons always fill up the ground so as to be flat with the top of the earthen banks, while the Romans left theirs hollow. However, the space is so large that it would take a vast labour to fill it up, therefore I propose that we should merely thicken the banks, and should, in Saxon custom, build a wall with turrets upon them. The sloping banks alone would be but a small protection against the onslaught of the Danes, but stone walls are another matter, and could only be carried after a long siege. If you fall in with my views you will each of you send half your serfs to carry out the work, and I will do the same, and will, moreover, pay fifty freemen who may do the squaring of the stones and the proper laying of them."
The proposal led to a long discussion, as some thought that there was no occasion as yet to take such a measure; but the thanes finally agreed to carry out Edmund's proposal.
CHAPTER IV: THE INVASION OF WESSEX
Edmund and Egbert devoted most of their time to the building of the new fort, living very simply, and expended the whole of the revenues of the lands on the payment of the freemen and masons engaged upon the work. The Roman fort was a parallelogram, the sides being about 200 yards long, and the ends half that length. It was surrounded by two earthen banks with wide ditches. These were deepened considerably, and the slopes were cut down more sharply. The inner bank was widened until it was 15 feet across the top.
On this the wall was built. It was faced on both sides with square stones, the space between filled up with rubble and cement, the total thickness being 4 feet. The height of the wall was 8 feet, and at intervals of 30 yards apart towers were raised 10 feet above it, one of these being placed at either side of the entrance. Here the bank was cut away, and solid buttresses of masonry supported the high gates. The opening in the outer bank was not opposite to the gate in the inner, being fifty yards away, so that any who entered by it would have for that distance to follow the ditch between the two banks, exposed to the missiles of those on the wall before arriving at the inner gate.
Five hundred men laboured incessantly at the work. The stone for the walls was fortunately found close at hand, but, notwithstanding this, the work took nearly six months to execute; deep wells were sunk in the centre of the fort, and by this means an ample supply of water was secured, however large might be the number within it.
A very short time after the commencement of the work the news arrived that King Edmund of East Anglia had gathered his forces together and had met the Danes in a great battle near Thetford on Sunday the 20th of November, and had been totally defeated by them, Edmund himself having been taken prisoner. The captive king, after having been for a long time cruelly tortured by the Danes, was shot to death with arrows. It was not long after this that news came that the whole of East Anglia had fallen into the hands of the Danes.
Early in the month of February, 871, just as the walls of his fort had begun to rise, a messenger arrived from the king bidding Edmund assemble all the men in his earlship and march at once to join him near Devizes, as the news had come that a great Danish fleet had sailed up the Thames and had already captured the royal town of Reading.
Messengers were sent out in all directions, and early the next morning, 400 men having assembled, Edmund and his kinsman marched away with them towards Devizes. Upon their arrival at that town they found the king and his brother with 8000 men, and the following day the army moved east towards Reading.