"How are we to get the aeroplane out of the shop? You know the door is locked."
"Yes, but I know something else, too. I noticed it to-day, and wondered why those men who came after the key didn't take advantage of it."
"What is it?"
"The bolts in the hinges of the door can be lifted out easily, and we can take the doors off."
"But we must get rid of the two soldiers who keep guard at night."
"We will do that some way, all right."
"Come on, then; let's get started."
Chester opened the door of their room and peered out.
"Coast clear," he announced.
Softly the two boys stole from the room and crept along the hall. They tip-toed down the stairs, opened the door, and went out with scarcely a sound. Outside they stopped. In front of the workshop they could see the two guards in conversation.