Gradually he made the discovery that beyond a grazed instep, for one of the barbs had penetrated his boot, he was unwounded. His ankle was throbbing painfully. In his fall he had sprained it. With an effort he regained his feet, clenched his teeth as a sharp twinge shot through his frame, and again pushed onwards. Although at a deminished pace he still ran--not from inclination but from a sense of duty.