The referee called captains Bobby Moore and Billy McNeill together and ordered them to tell their players to calm things down after forty-six free-kicks had been awarded in the first thirty minutes. An Alan Ball goal in the twenty-eighth minute gave England victory in this daggers-drawn centenary match between the two countries. Peter Storey and Norman Hunter were at the heart of the trouble with their fierce tackling, and this brought out the competitive spirit in the  likes of Billy Bremner, Bobby Moncur and Denis Law. For long spells players seemed more intent on kicking each other rather than the ball.  Scottish FA President Hugh Nelson described the game as 'a disgrace,' and made no secret of the fact that he thought England had started it with their retaliate-first approach. Veteran onlookers could not recall a more vićious encounter between the auld enemy, and football was the loser.

Source Notes

TheFA.com
Original newspaper reports
Rothman's Yearbooks
Mike Payne's England: The Complete Post-War Record (Breedon Books Publishing Company, Derby, U.K., 1993)
Norman Giller, Football Author
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CG