worked with them early and late.

To instil into the heads of his men the necessity of being in just the
right place at the right time, Tug drew a map of the field on a large
sheet of paper, and spread it on his center-table; then he took
twenty-two checkers and set them in array like two football teams. He
gathered his eleven into his room at night, told each man Jack of them
which checker was his, and set them problems to work out.

"Suppose I give the signal for the left-guard to take the ball around
the right-end," he would say, and ask each man in turn, "Where would
you go?"

Then the backs drew their checkers up to position as interference, and
the tackles and guards showed what particular enemies they were to
bowl over. Many ridiculous mistakes were made at first, and each man
had a good laugh at the folly of each of the others for some play that
left a big hole in the flying protection. But they could practise at
night and worry it out in theory, while their legs rested till the
next day's practice.

When he could find an empty recitation-room at an idle hour,
"Professor Tug," as they soon called him, would gather his class about
him and work out the same problems on the blackboards, each man being
compelled to draw an arrow from his position at the time of the signal
to his proper place when the ball was in play.

The game now became a true science, and the scrub took it up with
a new zest. This indoor drill made it easy also to revive a trick
popular at Yale in the 'Eighties--the giving of one signal to prepare