Instead of a reply there came a weird groan and then the rattle of some heavy chains. Stanley turned pale and began to tremble, but the Rovers were not much impressed.
"We don't believe in ghosts, so you might as well let us out!" cried Dick. "That stuff you set on fire is smothering us!"
At this there was a murmur from the next room, but what was said the prisoners did not know.
"Come on, let us get out of a window!" cried Tom. His head was commencing to swim, and he could hardly see.
"Tha—that's it," murmured Sam. "Say, I'm—I'm—going" He did not finish, but sank to the floor in a heap.
"Sam has been overcome!" cried Dick in horror.
"Oh, if only we hadn't come here!" groaned Stanley. "I—the window—I—am—smothering!" He took another step forward and then fell. Dick tried to pick him up, but went down also, with his brain in a whirl and strange lights flashing before his closed eyes.
Tom was the last to be overcome. He reached a window, only to find it tightly locked. He smashed the glass, but could not open the blinds. Then he went down; but before he closed his
