Walter Camp,
American Football
“ They must be [Pg 64] taught to block securely until the ball is on its way to the runner or kicker. The blocking of a guard is much less exacting in its requirements than that of the tackle. Not that he must not block with equal certainty, but the act requires no such covering of two men as often happens in the case of a tackle. The guard forms closely towards the centre, and then follows his man out if he moves out, but only as far as he can go, and still be absolutely certain that the opponent cannot pass between him and the snap-back. ”
