Harry picked up a big stone and dropped it into the opening.
They listened intently, but failed to hear it strike bottom in the pit.
"This hole must be of enormous depth!" the boy exclaimed, "else we would have heard that stone hit the bottom."
"Look at the church organ rising up from the depths against that side of the abyss," said Old King Brady, pointing across the chasm.
His light rested upon a number of stalactites forming what looked exactly like the pipes of an enormous organ.
Beneath them was a bank of keys.
The silence of death prevailed.
Nature had wrought a wonderful formation there.
The entire interior of the cave was pure white, looking like camphor.
Huge pendants like great icicles hung from the ceiling, and similar formations rose from the floor.