The number originally adopted for matches in this country was eleven on a side. From some silly notion that it would increase the skill displayed, this number was changed to fifteen, although the Englishmen were moving in the other direction by reducing their numbers from twenties to fifteens. A year or two of fifteen on a side drove the American players back to elevens, and there the number has rested. [Illustration: D. S. DEAN. Harvard.] In the early days of the sport, while the players individually were courageous, the team play was cowardly; that is, the tacticians were so taken up with a study of defence--how to protect the goal--that the attack was weak. The direct result of this was to place too few men in the forward line and too many behind it. If to-day we were to revert to fifteen on a side, there is little doubt that we should throw eleven of them up into the rush line, and upon occasion even twelve. We now realize that the best defence does not consist in planning how to stop a man after he has obtained a fair start towards the goal, but in throwing all available force up against him before he can get free of the forward line. The only way to effectively defeat this aggressive defence is by means of skilled kicking. It is possible with really good kickers to throw a team playing in this fashion into disorder by well-placed and long punting, followed up most sharply; but it requires nerve and an unfailing accuracy of aim and judgment. It is only a few years ago that it required considerable argument to convince a captain that he could with safety send one of his halves up into the forward line when his opponents had the ball; but it will take better kicking than is exhibited in most of the championship matches to frighten that half-back out of the line now. Even the quarter was wont upon occasion to drop back among the halves and assist them rather than the rushers. All the tendency for the last two years has been towards diminishing the number of men held in reserve, as it were, behind the line, and increasing by this means the crushing force by which the forwards might check either runner or kicker before his play could be executed. Should the English ever adopt an outlet for their scrimmage, making the play as direct as is ours, their men would gravitate to the forward line as rapidly as have our players. Next to the difference in scrimmage outlet between our game and that of the British stands a much more recent development, which we call interference. This is the assistance given to a runner by a companion or companions who go before him and break a path for him or shoulder off would-be tacklers. This, to the Englishman, would be the most detestable kind of off-side play, and not tolerated for an instant upon any field in the United Kingdom.