"Are these the proving grounds?" asked Tom.
"This is the entrance to them," replied the soldier, bringing his rifle to "port," according to the regulations. "What do you want?"
"To go in and watch the gun tests," replied Tom. "I have a permit," and he held it out so the soldier could see it
"That permit is no good here," the sentry exclaimed.
"No good?" faltered Tom.
"No, it has to be countersigned by General Waller. And, as he's on the proving grounds now, you can't see him. He's getting ready for the test of his new cannon."
"But that's just what we want to see!" cried Tom. "We want to get in there purposely for that. Can't you send word to General Waller?"
"I can't leave my post," replied the sentry, shortly. "You'll have to come another time, when the General isn't busy. You can't get in unless he countersigns that permit."
"Then it may be too late to witness the test," objected the young inventor. "Isn't there some way I can get word to him?"
"I don't think so," replied the sentry. "And I'll have to ask you to leave this vicinity. No strangers are allowed on the proving grounds without a proper pass."
