restrained. She had seen him intellectually excited many times; never emotionally till now. Something wayward, yet warm, in this new mood attracted her, because so like her own. But with a tact as native as her sympathy she showed no sign of this, except in the attentive look she fixed upon him as the moonlight bathed him in its splendor. He met the glance, seemed to interpret it aright, but did not answer its unconscious inquiry; for pausing, he asked abruptly—
"Should a rash promise be considered binding when it threatens to destroy one's peace?"
Sylvia pondered an instant before she answered slowly—
"If the promise was freely given, no sin committed in its keeping, and no peace troubled but one's own, I should say yes."
Still pausing, he looked down at her with that unquiet glance as she looked up with her steady one, and with the same anxiety he asked—
"Would you keep such a promise inviolate, even though it might cost you the sacrifice of something dearer to you than your life?"
She thought again, and again looked up, answering with the sincerity that he had taught her—
"It might be unwise, but if the sacrifice was not one of principle or something that I ought to love more than life, I think I should keep the promise as religiously as an Indian keeps a vow of vengeance."
As she spoke, some recollection seemed to strike Warwick like a sudden stab. The flush died out of his face, the fire from his eyes, and an almost grim composure fell upon him as he said low to himself, with a forward step as if eager to leave some pain behind him—
