A shout followed after him, and the last glimpse he had of the fat boy, Buster was shaking both fists in his direction, and pretending to display tremendous rage, though secretly chuckling with good-natured laughter. Happy the boy who is so constituted that he can in the best of humor take a joke that is leveled at himself; and that was Nick Longfellow to a dot.

The rest of the bunch soon scattered, as their homes lay in various directions; and this particular corner usually served as a gathering point as well as the place where they separated.

Jack may have allowed the mystery of the suspected “leak” to crop up in his active mind from time to time after that; but he knew just how sensitive Buster really felt over it, and he always religiously refrained from ever introducing the subject.

Some of the other boys of course must have discussed it as the days slowly passed; but they too seemed desirous that their fat chum might not have his feelings further injured, and nothing was said in his presence. But all the same Buster did not forget, as Herb was fated to learn to his sorrow.

[CHAPTER III—A CHANCE CLEW]

“Why, hello Jack!”

It was the first day of vacation, and being at the tail end of the week, the motor boat club had wisely decided to defer their departure until the following Monday morning, when they would say goodbye to the home town, and start across the state for Milwaukee.

The speaker was no other than Clarence Macklin; and Jack had come face to face with his bitter enemy upon the main street of the town, as he passed out from a shop where he had been making a little purchase.

Clarence was smiling, after his usual manner; but there was always something crafty about this look of his that made most boys suspicious. Had he been given his choice in the matter Jack would have passed on with a mere nod; for he did not believe in pretending to show anything like friendliness toward this tricky lad, who had once tried to get into the motor boat club, and been blackballed, a fact he had vowed to get even for if it took him a year.

But Clarence evidently had a reason for wishing to talk with the other. He even thrust himself squarely in Jack’s way; and the latter saw no reason why he should avoid an encounter.