“Something’s happening already,” grunted Brand.

Shef made no reply. For several minutes he had strained his one eye desperately to see what he could of the machines that were wreaking such havoc in Burgred’s army. Then he fixed on one, counted his heartbeats carefully between one launch and the next. By now he had a good idea of what the weapons were. They must be torsion-machines—the slow rate of shot showed that, as did the smashing effect, the swirls of men bowled over as each missile struck. They were not on a bow principle. Little as he could see from a mile’s distance, the square, high shape showed that. And the weight of them, the weight he could detect from the way they had to be slung on yards and pulleys—that showed they must be built stoutly to take some sort of impact. Yes. A little experiment, a closer look if he got the chance, and …

Time now to think more immediately. Shef turned his attention to the battle. Something happening, Brand said. And easy enough to guess what. After a few volleys, the men on the English side, nearest to where the stones were arriving, had started to edge sideways, realizing that safety lay in having wedges of their enemies between them and the machines. But as they edged sideways they hampered the efforts and the sword-arms of the champions trying to break through Ivar’s crewmen. Many of those champions, half-blinded by their helmets, weighed down by their armor, had no idea what was going on, only that something strange was happening round them. Some of them were beginning to step back, to look for space to raise their visors, to shove off the men who should be backing them but were jostling them instead. If Ivar’s men were concentrated they could use such a moment to break out. But they were not. They themselves were in small groups, each one liable to be swallowed instantly by superior numbers if they drove forward from their ships and the protecting riverbank. The battle hung in balance.