Luckily the court was hidden from the school by a group of evergreen trees and so no one observed the two conspirators that afternoon. Patiently Joy explained the play, and Muriel, who was used to quick thought and action in her sailboat, was an apt pupil.

At the end of the first half hour Joy declared that practice was all that the island girl needed to perfect her in the smash stroke. “Meet me every day at this hour,” her instructress said, as they returned to the school by a roundabout path, keeping their rackets well hidden.

With each succeeding day Joy’s pleasure in her pupil increased. She did not have to expend much energy herself, as when the ball fell dead she merely picked it up and tossed it over the net. At first Muriel succeeded only once in a while, but on the fifth day she never failed.

And yet, at the practice hour with the other girls, not once did Rilla betray the fact that she knew the smash stroke. Joy wanted to surprise them on the day of the tournament.

Faith, Gladys and Catherine wondered why Joy seemed to be so excited about the coming game, indeed almost jubilant.

CHAPTER XXXI.
THE TENNIS GAME.

A glorious autumn day dawned, and great was the excitement at High Cliffs, for many interesting events were to take place before the setting of the sun, foremost among them being the contest for the tennis championship.

Joy had told the three with whom she had expected to play that she wished they would continue their plans and permit Muriel to take her place.

Catherine Lambert had stared in amazement. “Joy,” she exclaimed, “you don’t think that Muriel Storm can play well enough to enter the tournament, do you?” Then added: “Not but that I would be glad indeed to play with Muriel, but since she has had scarcely a month’s practice I merely thought her hardly well enough prepared; and, of course, we don’t want to fail so completely that we will be laughed at by the entire school.”

Joy, for one impulsive moment, was inclined to tell Cathy the whole truth, but her better judgment prevailed, for she thought it very possible that Muriel might become self-conscious when she found herself playing before so many spectators and perhaps forget the trick she had so recently learned. After all it would be better not to praise the island girl’s playing too much, for she might fail.