But Grace was in no mood for poetry--even a lover's. She let her head drop upon his shoulder, and then said-- "You must go on, dear, and leave me here." "Grace!" "Yes, Philip! I can live till you come back. I fear no danger now. I am so much better off than _they_ are!" A few tears dropped on his hand. Philip winced. Perhaps it was his conscience; perhaps there was something in the girl's tone, perhaps because she had once before spoken in the same way, but it jarred upon a certain quality in his nature which he was pleased to call his "common sense." Philip really believed himself a high-souled, thoughtless, ardent, impetuous temperament, saved only from destruction by the occasional dominance of this quality. For a moment he did not speak. He thought how, at the risk of his own safety, he had snatched this girl from terrible death; he thought how he had guarded her through their perilous journey, taking all the burdens upon himself; he thought how happy he had made her--how she had even admitted her happiness to him; he thought of her present helplessness, and how willing he was to delay the journey on her account; he dwelt even upon a certain mysterious, ill-defined but blissful future with him to which he was taking her; and yet here, at the moment of their possible deliverance, she was fretting about two dying people, who, without miraculous interference, would be dead before she could reach them. It was part of Philip's equitable self-examination--a fact of which he was very proud--that he always put himself in the position of the person with whom he differed, and imagined how _he_ would act under the like circumstances. Perhaps it is hardly necessary to say that Philip always found that his conduct under those conditions would be totally different. In the present instance, putting himself in Grace's position, he felt that he would have abandoned all and everything for a love and future like hers. That she did not was evidence of a moral deficiency or a blood taint. Logic of this kind is easy and irrefutable. It has been known to obtain even beyond the Sierras, and with people who were not physically exhausted. After a pause he said to Grace, in a changed voice--