overed the real cause of the variation.
You don't mind a few excerpts from my lectures? But wait a minute; let
me show you something else."

It was long after eight o'clock, so imperceptibly did the time slip
away, when they emerged from the cabin, and Emmet prepared to go.
Leigh looked at his watch, and realised with a quickening of his pulses
that the visit so eagerly anticipated must be imminent, that Miss
Wycliffe might even now be coming up the stairs. What if she had come,
and, failing to find him below to guide her, had gone away offended?
At the thought, he rushed back into the cabin and lighted the lantern
which he used for his transits up and down the tower. When he came out
again, he found that Emmet, instead of going, had drifted over to the
western parapet, where he stood looking through an embrasure, as if the
later engagement of which he had spoken were his last concern.

"My other visitors will be coming soon," Leigh explained, "and I must
go to light them up the stairs."

He thought of the probable composition of the party, and reflected that
it would simplify the situation if Emmet should go before their
arrival. But his visitor failed to accept his implied suggestion. Was
he dazed by the immensities into which he had looked, or did he form a
sullen resolve to remain and meet that society against which he had so
bitterly inveighed? Leigh knew that he could count on Miss Wycliffe's
friendliness and upon her tact in meeting a situation, but he guessed
that, if her companions were of like mind with the bishop, his present
guest might be made to feel that he was an intruder.

"Just look at that car over in the valley," Emmet called, without
turning. "It crawls through the darkness like an illuminated
centipede."

Leigh was struck by the comparison, and in spite of his impatience, he
went over and glanced through another depression in the wall. At the
moment of turning away he was arrested by the distant panting of a
motor-car far down the boulevard that skirted the cliff. Instinctively
he waited to see it pass, as one waits for the passing of a train.
Turning his eyes in the direction of the sound, which ascended with
startling distinctness through the night air, he presently saw a gleam
shoot above the hill; and now the great touring-car came on at
breakneck pace, searching the dusty highway a hundred yards in advance
with a clean pencil-shaft of light.

He was far from suspecting that he