Someone, in the dark, shifted his feet, Roger imagined, uneasily.

“You don’t mean to say you left it there!” It was Toby who made the gasping admission in his sudden excitement.

He knew it was there!

“Still where, for all your seeming denseness, you worked out its place,” agreed Grover. “If you care to, you might apologize to Roger for telling the millionaire collector that he had it. Of course it was to avert all suspicion from yourself.”

“Aw—”

He did not have time to complete his denial or blustering cry.

A light in the tell-tale went out. The main door was opening.

“Nervy,” commented Grover.

A strange, heavy thudding, or thumping, accompanied by something as much like the drag of a heavy rope as any other sound, told Roger that some weird development was coming. Could it be—really, a kangaroo?

And why, then, was there a strange chattering and jumping sound?