“Easy, wasn’t it?” murmured Emma as she strolled leisurely past the fat boy.

“What is easy?” demanded Chunky sharply.

“Oh, never mind if you don’t know.”

“Is this a joke you are trying to play on me?” bristled Stacy.

“It may be,” answered Emma, passing on with chin elevated, Stacy regarding her frowningly.

Three times that night, ere the Overlanders turned in, did “Old Faithful” rear its huge column of steam and water into the air. In the darkness the column was a huge pale spectre of the night. The sight of this ghostly monster, and the hiss and the roar, sent shivers up and down the backs of the Overland girls.

“This is no place for a superstitious person, which, thank goodness, I am not,” declared Elfreda Briggs.

Quite early in the evening a Park guard stopped at the camp to see who the campers were. He recognized the party, having seen them at the Mammoth Springs Hotel some days before. The guard told them of the second robbery at the hotel, hie story coinciding with what Jim Badger had already told them.

Grace Harlowe was thoughtful, and took no part in the discussion that followed. Strange thoughts were passing through her mind, with Stacy Brown regarding her narrowly out of the corners of his eyes.

“Wonder what’s in the back of her head?” mused the fat boy after the guard had left and the Overlanders were preparing for bed.