A more detailed description of football is given in Francis Willughby's Book of Games, written in about 1660. Willughby, who had studied at Bishop Vesey's Grammar School,SuttonColdfield, is the first to describe goals and a distinct playing field: "a close that has a gate at either end. The gates are called Goals." His book includes a diagram illustrating a football field. He also mentions tactics ("leaving some of their best players to guard the goal"); scoring ("they that can strike the ball through their opponents' goal first win") and the way teams were selected ("the players being equally divided according to their strength and nimbleness"). He is the first to describe a "law" of football: "they must not strike [an opponent's leg] higher than the ball".