"Lands sakes!" cried Rebecca.

"There now!" exclaimed Copernicus, bustling toward the windows, "I must be a nateral born fool!"

Phœbe laughed in high spirits at thought of her prank, while Droop closed the tight iron shutters at each window, thus confining every ray of light.

Rebecca seated herself opposite Phœbe and looked severely straight before her with her hands folded in her lap. She was ashamed of her curiosity and much chagrined at being discovered in this unconventional situation by her younger sister.

Phœbe gazed about her and, having taken in the general aspect of the antechamber in which they were assembled, she explored the two state-rooms. Thence she returned for a more detailed survey. Droop followed her about explaining everything, but Rebecca remained unmoved.

"What's all those dials on the wall, Mr. Droop?" asked the younger sister.

"I wish't you'd call me Cousin Copernicus," said Droop, appealingly.

Phœbe ran up very close to a large steel dial-plate covered with figures.

"Now what the land is this for?" she exclaimed.

"Thet," said Droop, slowly, "is an indicator of height above ground and tells yer direction."