Within the line of his vision she moved horizontally, but never back and forth.  Sometimes her veiled face was averted, and sometimes, through the eternal barrier of chiffon, he could feel her burning eyes fixed pitilessly upon his.

He never slept, now, without drugs.  Gradually he had increased the dose, but to no purpose.  Evelina haunted his sleep endlessly and he had no respite.  Through the dull stupor of the night, she was never for a moment absent, and in every horrible dream, she stood in the foreground, mute, solitary, accusing.

He was fully aware of the fact that he was in the clutches of a drug addiction, but that was nothing to be feared in comparison with his veiled phantom.  He had exhausted the harmless soporifics long ago, and turned, perforce, to the swift and deadly ministers of forgetfulness.

The veiled figure moved slowly back and forth across the yard, lifting its skirts daintily to avoid a tiny pool of water where a thirsty robin was drinking.  The robin, evidently, did not fear Evelina.  He could hear the soft, slow footfalls on the turf, and the echo of three or four steps upon the brick walk, when she crossed.  She kept carefully within the line of his vision; he did not have to turn his head to see her.  When he did turn his head, she moved with equal swiftness.  Not for a single pitying instant was she out of his sight.

Farther on, doubtless, as he thought, she would come closer.  She might throw back her veil as she had done on that terrible night, or lay her cold hand on his—­she might even speak to him.  What hideous conversations they might have—­he and the woman he had once loved and to whom he was still bound!  Anthony Dexter knew now that even his marriage had not released him and that Evelina had held him, through all the five-and-twenty years.

Such happiness as he had known had been purely negative.  The thrill of joyous life had died, for him, the day he took Evelina into the laboratory.  He was no longer capable of caring for any one except Ralph.  The remnant of his cowardly heart was passionately and wholly given to his son.

He meditated laying his case before Ralph. as one physician to another, then the inmost soul of him shuddered at the very thought.  Rather than have Ralph know, he would die a thousand deaths.  He would face the uttermost depths of hell, rather than see those clear, honest eyes fixed upon him in judgment.

He might go to the city to see a specialist—­it would be an easy matter to accomplish, and Ralph would gladly attend to his work.  Yes, he might go—­he and Evelina.  He could go to a brother physician and say: 

“This woman haunts me.  She saved my life and continually follows me.  I want her kept away.  What, do you not see her, too?”

Anthony Dexter laughed harshly, and fancied that the veiled figure paused slightly at the sound.  “No,” he said, aloud, “you need not prepare for travel, Evelina.  We shall not go to the city—­you and I.”