The Psychological Regulator

Roald grinned savagely in the eyes of an archer. "Draw," he shouted, and as the Englishman reached he spitted him on the curve of Al Azaaf. A new blade crossed his, and with dirk and sword he ranged up and down the length of a square with his foe, a dark-eyed young man who fought precisely and quietly. Behind him he felt the spearhead break into bits and the body of the guard charged the Norse.

The youth extended his body in a strange thrust, and Roald cursed the queer, slim weapon he used—a thing like a dart with a hilt. The Viking slashed once, and the youth parried. Roald slashed again, and there was the shock known to swordsmen as steel clashed steel. The youth was weaponless, and Roald cut him down where he stood, kicked the body in the ribs, then spun to defend himself against an assault from a clumsy pike.