Isaac Thornycroft remained at his work; Richard went back again up the passage. Not quickly; some latent doubt, whence arising he could not see or trace, lingered on his mind still--his better angel perhaps urging him from the road he was going. Certain it was: he remembered it afterwards even more vividly than he felt it then: that a strong inclination lay upon him to stop the work for that night. But it appeared not to hold reason, and was disregarded.
He emerged from the subterranean passage, lightly shut the trap-door--which could be opened from the inside at will, when not fastened down--and took his way to the plateau to watch against intruders. This would bring it to about the time that the two young ladies had gone there, and Sarah, her apron over her head, had taken her place on the low red stone. In her evidence the woman had said it might be a quarter of an hour or twenty minutes since she met Robert Hunter starting on his journey; it had taken Richard about that time to do since what he had done; and it might have taken Robert Hunter about the same space (or rather less) to walk quickly to the wherry, and come back again. And come back again! Richard Thornycroft could have staked his life, had the question occurred to him, that Hunter would not come back: he never supposed any living man, calling himself a gentleman, could be guilty of so great treachery. But the doubt never presented itself to him for a moment.
What then was his astonishment, as he ran swiftly and stealthily (escaping the sight of Sarah Ford, owing, no doubt, to her crouching posture on the stone, and the black apron on her head) up the plateau, to see Robert Hunter? He was at its edge, at the corner farthest from the village; was looking out steadily over the sea, as if watching for the boats and their prey. Richard verily thought he must be in a dream: he stood still and strained his eyes, wondering if they deceived him; and then as ugly a word broke from him as ever escaped the lips of man.
Thunderstruck with indignation, with dismay, half mad at the fellow's despicable conduct, believing that if any in the world ever merited shooting, he did; nay, believing that the fool must court death to be there after his, Richard's, warning promise; overpowered with fury, with passion, Richard Thornycroft stood in the shade of the Round Tower, his eyes glaring, his white teeth showing themselves from between the drawn lips. At that same moment Robert Hunter, after stooping to look over the precipice, turned round; the ugly fur on the breast of his coat very conspicuous. May Richard Thornycroft be forgiven! With a second hissing oath, he drew the pistol from his breast-pocket, pointed it with his unerring hand, and fired; and the ill-fated man fell over the cliff with a yelling cry. Another shriek, more shrill, arose at Richard's elbow from the shade of the Round Tower.
"So ye cursed sea-bird," he muttered. "He has got his deserts. I would be served so myself, if I could thus have turned traitor!"
But what was it seized Richard's arm? Not a seabird. It was his sister Mary Anne. "You here!" he cried, with increased passion. "What the fury!--have you all turned mad to-night?"
"You have murdered him!" she cried, in a dread whisper--for how could she know that Anna Chester had fallen senseless and could not hear her?--"you have murdered Robert Hunter!"
"I have," he answered. "He is dead, and more than dead. If the shot did not take effect, the fall would kill him."
"Oh, Richard, say it was an accident!" she moaned, very nearly bereft of reason in her shock of horror. "What madness came over you?"
"He earned it of his own accord; earned it deliberately. I held my pistol to his head before, this night, and I spared him. I had him on his knees to me, and he took an oath to be away from this place instantly, and to be silent. I told him if he broke it, if he lingered here but for a moment, I would put the bullet into him. I saw him off; I send Cyril with him to speed him on his road; and--see!--the fool came back again. I was right to do it."