Those teams upon which the work of end and tackle has been best developed have, for the last few years, been markedly superior in the opposition offered to plays of their opponents. This fact in itself is an excellent guide to the style of play one ought to expect from these two positions. The four men occupying them are the ones to meet nine tenths of the aggressive work of the opponents. The position of end has already been dwelt upon at length. That of tackle, a position much later to reach the full stage of development than the end, has nevertheless now attained almost an equal prominence. The tackle is an assistant to both end and guard, while he has also duties of his own demanding constant attention. When the opponents have the ball and are about to kick, the tackle is one of the most active components of the line. He may not be moving until the ball is snapped, but upon the instant that it is played he is at work. He may himself go through to prevent the pass or kick, or still oftener he may make a chance for a line half-back to do this. By a line half-back is meant that one who, upon his opponents' plays, comes up into the line and performs the duties of a rusher. This method has become so common of late that it is well understood. The play of this line half-back must dovetail into the work of the tackle so well as to make their system one of thoroughly mutual understanding. For this reason they should do plenty of talking and planning together off the field, and carry their plans into execution in daily practice until they become in company a veritable terror to opponents, particularly to kicking halves.