Zad first attempted to rush me down as a bull might a wolf, but I was much too quick for him, and each time I sidestepped his rushes he would go lunging past me, only to receive a nick from my sword upon his arm or back. He was soon streaming blood from a half dozen minor wounds, but I could not obtain an opening to deliver an effective thrust. Then he changed his tactics, and fighting warily and with extreme dexterity, he tried to do by science what he was unable to do by brute strength. I must admit that he was a magnificent swordsman, and had it not been for my greater endurance and the remarkable agility the lesser gravitation of Mars lent me I might not have been able to put up the creditable fight I did against him.