Centerport was advantageously located for both land and water sports, being situated on the level shore of a beautiful lake, many miles in extent, with a range of low hills behind it to shelter the city from the north.

The boys of the three High Schools of the city—East, West and Central—were rivals in baseball, football, rowing, and track athletics; and on this particular Saturday the first baseball game of the season was to be played between East and West High School nines. Central High, which Laura Belding and Bobby Hargrew attended, had a good team, too, and the girls—loyal to their boy friends—would have “rooted” for the home team had the Central club been playing.

However, the girls of Central High—especially the Sophomores and Juniors—had a particular reason for attending no baseball game on this afternoon. As soon as her luncheon was finished, Laura excused herself and hurried away from Mostyn’s restaurant toward the schoolhouse.

Her route lay past Mr. Hargrew’s grocery—one window of which was the scene of Bobby Hargrew’s latest practical joke. The sun was very hot for so early in the year, and the grocery was on the sunny side of the street. It was long enough past noon for the sun’s rays to pour into the wide window.

Just before Laura reached Mr. Hargrew’s store she saw a tow-headed boy, with a baseball cap stuck on the very back of his head, coming whistling along the hot walk with his hands in his pockets.

“Billy Long might just as well not have any hat on at all,” thought Laura, smiling as she beheld the freckled, good-natured face of the towhead.

And then, quite suddenly, Billy Long’s actions amazed Laura Belding.

He halted, as though struck motionless by the sight of Bobby’s joke in the store window. Then he leaped to the window, leaped back, turned to look up and down the almost deserted street (there was nobody in sight but Laura for two or three blocks) and then dashed toward the corner which the girl had but a few seconds before passed.

“What’s the matter with you, Billy Long?” cried Laura.

“Fire!” bawled the boy. “Mr. Hargrew’s store’s afire! Fire!”