"That's excitement enough for one night," remarked John Smith. "It succeeded better than I thought it would."

"That was a great idea," said Jack.

"Glad you think so," the Indian went on.

"I've seen soldiers at the Canadian forts play all sorts of tricks with gunpowder and slow fuse so I just adopted some of them. It was easy enough, after they laid the powder train, with the initials of you, Sam, and Bony, to change them into a general serpentine twist with their initials in the midst of it. By ramming some of the powder down into the holes in the foundation it exploded with quite a noise."

"Lucky you had those chemicals in your room, Jack, or I'd never been able to make that board with the words 'We did it' on and stick it up in front of Adrian's window. I used part of their own long fuse, and it was a good one."

"Seemed to do the work all right," agreed Sam.

"It sure did," observed Jack. "I wonder what they thought when they saw the fire coming their way?"

"Hush! Here comes some one!" exclaimed Sam. and the boys put out their light, which was burning low.

"It's Dr. Mead; I know his step," said Jack.

"I'll bet he's on his way to Bagot's room," spoke Sam. "Cracky! I'm glad it isn't me."