From that day forth, by some unspoken compact, it was “Eustace” and “Cleer,” wherever they met, between them. Le Neve began it, by coming round in the afternoon of that self-same day, as soon as he’d slept off the first effects of his fatigue and chill, to inquire of Mrs. Trevennack “how Cleer was getting on” after her night’s exposure. And Mrs. Trevennack accepted the frank usurpation in very good part, as indeed was no wonder, for Cleer had wanted to know half an hour before whether “Eustace” had yet been round to ask after her. The form of speech told all. There was no formal engagement, and none of the party knew exactly how or when they began to take it for granted; but from that evening on Michael’s Crag it was a tacitly accepted fact between Le Neve and the Trevennacks that Eustace was to marry Cleer as soon as he could get a permanent appointment anywhere.

Engineering, however, is an overstocked profession. In that particular it closely resembles most other callings.

The holidays passed away, and Walter Tyrrel recovered, and the Trevennacks returned to town for the head of the house to take up his new position in the Admiralty service; but Eustace Le Neve heard of no opening anywhere for an energetic young man with South American experience. Those three years he had passed out of England, indeed, had made him lose touch with other members of his craft. People shrugged their shoulders when they heard of him, and opined, with a chilly smile, he was the sort of young man who ought to go to the colonies. That’s the easiest way of shelving all similar questions. The colonies are popularly regarded in England as the predestined dumping-ground for all the fools and failures of the mother-country. So Eustace settled down in lodgings in London, not far from the Trevennacks, and spent more of his time, it must be confessed, in going round to see Cleer than in perfecting himself in the knowledge of his chosen art. Not that he failed to try every chance that lay open to him—he had far too much energy to sit idle in his chair and let the stream of promotion flow by unattempted; but chances were few and applicants were many, and month after month passed away to his chagrin without the clever young engineer finding an appointment anywhere. Meanwhile, his little nest-egg of South-American savings was rapidly disappearing; and though Tyrrel, who had influence with railway men, exerted himself to the utmost on his friend’s behalf—partly for Cleer’s sake, and partly for Eustace’s own—Le Neve saw his balance growing daily smaller, and began to be seriously alarmed at last, not merely for his future prospects of employment and marriage, but even for his immediate chance of a modest livelihood.

Nor was Mrs. Trevennack, for her part, entirely free from sundry qualms of conscience as to her husband’s condition and the rightfulness of concealing it altogether from Cleer’s accepted lover. Trevennack himself was so perfectly sane in every ordinary relation of life, so able a business head, so dignified and courtly an English gentleman, that Eustace never even for a moment suspected any undercurrent of madness in that sound practical intelligence. Indeed, no man could talk with more absolute common sense about his daughter’s future, or the duties and functions of an Admiralty official, than Michael Trevennack. It was only to his wife in his most confidential moments that he ever admitted the truth as to his archangelic character; to all others whom he met he was simply a distinguished English civil servant of blameless life and very solid judgment. The heads of his department placed the most implicit trust in Trevennack’s opinion; there was no man about the place who could decide a knotty point of detail off-hand like Michael Trevennack. What was his poor wife to do, then? Was it her place to warn Eustace that Cleer’s father might at any moment unexpectedly develop symptoms of dangerous insanity? Was she bound thus to wreck her own daughter’s happiness? Was she bound to speak out the very secret of her heart which she had spent her whole life in inducing Trevennack himself to bottle up with ceaseless care in his distracted bosom?

And yet ... she saw the other point of view as well—alas, all too plainly. She was a martyr to conscience, like Walter Tyrrel himself; was it right of her, then, to tie Eustace for life to a girl who was really a madman’s daughter? This hateful question was up before her often in the dead dark night, as she lay awake on her bed, tossing and turning feverishly; it tortured her in addition to her one lifelong trouble. For the silver-haired lady had borne the burden of that unknown sorrow locked up in her own bosom for fifteen years; and it had left on her face such a beauty of holiness as a great trouble often leaves indelibly stamped on women of the same brave, loving temperament.

One day, about three months later, in their drawing-room at Bayswater, Eustace Le Neve happened to let drop a casual remark which cut poor Mrs. Trevennack to the quick, like a knife at her heart. He was talking of some friend of his who had lately got engaged. “It’s a terrible thing,” he said, seriously. “There’s insanity in the family. I wouldn’t marry into such a family as that—no, not if I loved a girl to distraction, Mrs. Trevennack. The father’s in a mad-house, you know; and the girl’s very nice now, but one never can tell when the tendency may break out. And then—just think! what an inheritance to hand on to one’s innocent children!”

Trevennack took no open notice of what he said. But Mrs. Trevennack winced, grew suddenly pale, and stammered out some conventional none-committing platitude. His words entered her very soul. They stung and galled her. That night she lay awake and thought more bitterly to herself about the matter than ever. Next morning early, as soon as Trevennack had set off to catch the fast train from Waterloo to Portsmouth direct (he was frequently down there on Admiralty business), she put on her cloak and bonnet, without a word to Cleer, and set out in a hansom all alone to Harley Street.

The house to which she drove was serious-looking and professional—in point of fact, it was Dr. Yate-Westbury’s, the well-known specialist on mental diseases. She sent up no card and gave no name. On the contrary, she kept her veil down—and it was a very thick one. But Dr. Yate-Westbury made no comment on this reticence; it was a familiar occurrence with him—people are often ashamed to have it known they consult a mad-doctor.

“I want to ask you about my husband’s case,” Mrs. Trevennack began, trembling. And the great specialist, all attention, leaned forward and listened to her.

Mrs. Trevennack summoned up courage, and started from the very beginning. She described how her husband, who was a government servant, had been walking below a cliff on the seashore with their only son, some fifteen years earlier, and how a shower of stones from the top had fallen on their heads and killed their poor boy, whose injuries were the more serious. She could mention it all now with comparatively little emotion; great sorrows since had half obliterated that first and greatest one. But she laid stress upon the point that her husband had been struck, too, and was very gravely hurt—so gravely, indeed, that it was weeks before he recovered physically.

“On what part of t............