The second wave of attackers approached, crossbowmen who pushed between the halberdiers, used knives to sever the last of the bindings, heaved stakes aside, climbed over and through them.

Shef followed them, pushing forward through the jostling ranks. No need to shout orders. The crossbowmen were following their long-rehearsed instructions, pacing forward ten carefully counted steps, then stopping and forming a line. Others halted behind them to make a double line that stretched from wall to river-line. Swift runners dashed forward to cut the tent-ropes, fled back to safety as the archers fitted bolts to cocked strings.

A few drabs and youths had seen them, had stood gape-mouthed and fled. But incredibly, none of Ivar’s men seemed aware of their presence, totally taken up with the familiar clash of weapons coming from the other wall.

Shef stepped a pace beyond the double line, saw the faces turning toward him for the prearranged signal. He raised his arm, dropped it. The heads turned to their front, sighted for an instant. Then the sharp snap of a hundred strings released together.

The short, stout arrows shot across the camp, driving through leather and mail and flesh.

Already the front rank had hooked onto their tackle to reload, while the second rank stepped forward between them, looked to Shef, caught his signal, loosed their second volley.

Shouts of alarm and disbelief were now mingling with cries of pain as the warriors saw men falling, all to the rear of the battle. Heads turned, faces pale in the dawn’s light, to see the silent death that was striking them from the rear, while the Vikings of the Way still kept up their violent pressure from the front, expending energy furiously in an assault they had been promised would last only minutes.

The first row of bowmen was ready again. As each man finished loading, he stepped through the line in front to resume rank. Some faster than others. Shef waited impassively till the last had formed up—the lines must be kept separate if this maneuver was to work—before he dropped his arm again.

Four times the lines shot before the first of the defenders could turn, order themselves and race across the camp in a wavering line, hindered by collapsed tents and the embers of cooking fires. As they closed, the bowmen obeyed orders again. Shot if they had loaded, then turned and ran with the rest, through the ranks of halberdiers dressed behind them. The halberdiers shifted sideways to let their fellows pass, then closed ranks again in a solid line of points.

“Don’t advance, just stand!” shouted Shef as he followed the last of the crossbows through. Few could hear him over the growing din of war-cries. Yet he knew this was the moment Brand had said would not work: the puny slave-born taking the full weight of a Viking charge.