He made a quick motion with his right arm as though he were jerking something. From across the battlefield came the faint sound of a bell. Almost instantly followed the sharp rattle of many machine-guns being fired at once.
"Hear that?" demanded Dubois enthusiastically. "Isn't that great?"
"What are you doing?" asked Leon curiously. "You don't mean to say that you made that bell ring."
"Oh, is that so?" exclaimed Dubois gleefully. "I'll show you again as soon as they stop that noise over there."
Gradually the fire from the German trenches died down and the front regained its former state of comparative quiet. Once again Dubois jerked his arm and again came the sound of the bell, followed by the sudden burst of machine-gun and rifle fire.
"Dubois! What have you got there?" demanded Earl.
"A string," said Dubois almost beside himself with laughter.
"That ball of twine I brought out?" asked Earl.
"Yes," said Dubois. "That's the one."
"And you sneaked out and tied it to that bell?" demanded Leon.