“Wait until I get my revolver,” whispered Jerry. “We’ll soon see if it’s a ghost or not.”
“Don’t fire,” cautioned the professor. “It may be some one trying to scare us, but we have no right to fire at any one.”
“I’ll give ’em a warning, at any rate,” said the lad. He went to the opening and called down:
“Tell us who you are or I’ll shoot, do you hear?”
A groan and the clanking of chains was the only answer. This was followed by a violent agitation and shaking of the ladder.
“Bang!” went Jerry’s revolver. He had fired into the air.
Succeeding the report there was a silence. This was broken by a further clanking of chains. Then came a crash, and when the echo of this died away the sound of feet running away could be heard.
“Pretty solid footsteps for a ghost,” commented Ned.
“Look! Look!” cried Bob, pointing out of the window.