While Dave Darrin was on his way home, however, and going along a dark part of the street, something whizzed by his head, striking the sidewalk just ahead.
"Quit your fooling!" yelled Dave, wheeling about angrily.
No human being, however, was in sight. Dave ran back, some two hundred feet in all, but could see no one on the little street, nor in any hiding place near by.
Then Dave went back to inspect the missile. It was a stone, slightly larger than his two fists together.
"Whew!" whistled Dave inwardly. "That thing wasn't meant for any joke, either!"
CHAPTER IX
AN AWESOME RIVER DISCOVERY
"Want to come, fellows?" asked Greg, halting Dick and Dave on Main Street Saturday morning.