It seems incredible that the savage could have gained any knowledge of the interior of the fortification or of the location of the defenders. The gloom was too deep to permit the use of any vision except that of the owl or cat. He had probably withdrawn to repeat his attempt at some other point.
Again, the marvelous delicacy of hearing told the girl that her enemy was in motion, not directly in front of the boulder, but on the left, in the direction of George Ashbridge. She peered intently at that point, wondering how much longer she ought to remain motionless and mute, and on the point of calling, in a suppressed voice, to her lover, when something whisked by her elbow, too quickly or too dimly seen for her to comprehend at once what it meant.
Then it flashed upon her.
"George!" she called, in an undertone, so full of dread and terror that he was at her side in an instant.
"What's the matter? What has happened?"
"There's an Indian within the inclosure!"
"Impossible! You are mistaken!"
"I saw him this minute."
"Where? Tell me how it was!" he whispered, seizing her hand, and quick to catch her excitement.
"I saw the top of his head peeping over this very rock in front of me. I was about to call to you, when he dropped down again. The next moment he passed over the spot where you are. He did it so quickly and silently that I heard nothing, and caught only the most shadowy glimpses of him."