How, indeed? Don gathered himself up, and stooping low over the broken trap-door proceeded to examine it carefully. There was an iron bolt on the under side, and this was shot fully home, the handle of the bolt being turned to prevent it being shaken back.

“It is certainly queer,” muttered Don, and Pam felt a cold shiver steal all over her.

“I am going down with you,” said Jack, as Don unbolted the bit of the trap-door that had not broken away, and prepared to trust his weight on the ladder that showed dimly from below.

“Better let me get landed at the bottom first. We don’t know the strength of the ladder, you see; and it is not worth while to invite disaster,” said Don. He set foot on the ladder with extreme caution, and clinging with both hands to the framework of the trap-door, stamped and banged at the ladder to test its firmness. “It feels sound enough, and is more solid than usual, so here goes!”

The silence above was so tense that the noise of the horse munching grass on the other side of the tote road came to the others plainly enough as they stood watching Don disappear in the darkness of the cellar.

“I am down!” he announced a minute later; and Jack had stepped on to the ladder, disappearing also, before Don had time to fumble in his pockets for a match-box to get a light.

Pam was stooping over the opening. She saw the flash of the match, then heard a frightened cry from Jack, and a startled word from Don.

“What is it?” she cried. She was shaking all over as if she had an ague, cold chills were creeping up her back, and yet she could feel the perspiration trickling slowly down her face.

“What have you found?” demanded Mrs. Walsh, thrusting Pam aside in her excitement, and coming to kneel by the yawning hole in the floor.

There was a long moment of silence, then Don’s voice spoke from below.