“I am indebted to Mr. Holliday’s son, then, for the help that has saved my life,” said the medical student, speaking to himself, with a singular sarcasm in his voice. “Come here!”

He held out, as he spoke, his long, white, bony right hand.

“With all my heart,” said Arthur, taking his hand cordially. “I may confess it now,” he continued, laughing, “upon my honor, you almost frightened me out of my wits.”

The stranger did not seem to listen. His wild black eyes were fixed with a look of eager interest on Arthur’s face, and his long bony fingers kept tight hold of Arthur’s hand. Young Holliday, on his side, returned the gaze, amazed and puzzled by the medical student’s odd language and manners. The two faces were close together; I looked at them, and, to my amazement, I was suddenly impressed by the sense of a likeness between them—not in features or complexion, but solely in expression. It must have been a strong likeness, or I should certainly not have found it out, for I am naturally slow at detecting resemblances between faces.

“You have saved my life,” said the strange man, still looking hard in Arthur’s face, still holding tightly by his hand. “If you had been my own brother, you could not have done more for me than that.”

He laid a singularly strong emphasis on those three words “my own brother,” and a change passed over his face as he pronounced them—a change that no language of mine is competent to describe.

“I hope I have not done being of service to you yet,” said Arthur. “I’ll speak to my father as soon as I get home.”

“You seem to be fond and proud of your father,” said the medical student. “I suppose, in return, he is fond and proud of you?”

“Of course he is,” answered Arthur, laughing. “Is there anything wonderful in that? Isn’t your father fond—”

The stranger suddenly dropped young Holliday’s hand and turned his face away.