The mystery of the robbery of the Webster bank was a mystery no more. The rising sun found the virtuous Mr. Callister and the two Cutts snugly ensconced in the Tombs. Before a force so overwhelming they had not even tried to resist. And then the whole thing came out, and the newspapers rang with it next day. It appeared that the first information of the intended robbery of the Lispenard bank had been given by Frank Mansfield, who walked boldly into the office of the Chief of Police, told his whole story and placed the plans found in the coat of Callister in his hands. It was upon information thus received that the police secreted themselves in the bank after nightfall, stationing the "Bats" to watch outside and sound the alarm of the approach of the burglars by their usual cry. The arrival of Detective Hook had been an entirely independent affair. Reviving at last from his swoon, this brave officer had escaped by the secret passage--an old sewer beneath the Donegal Shades, used doubtless by the scoundrels who frequented that den for the conveyance of stolen goods--as we have seen, and hurrying to the Oak street station had made his story known, and started with a number of policemen for the Lispenard bank. Of their timely arrival we are already informed. That the arrest of Callister made a tremendous stir in financial circles need not be told. But Frank Mansfield stands to-day rich, happy and prosperous, his name justified before the world. The officers of the Webster bank now understand his innocence, and would be only too glad to receive him again into their employ. But Frank has no need for further toil. From beneath the ruins of the Three Oaks there came forth a golden treasure which has placed him beyond all fear of want. For a round half million will do that and leave some to spare, even in these expensive days, and such proved to be the value of the gold and gems buried by that strange old man, Jeremiah Mansfield, in the cellar of the great house where for so many years he dwelt alone. During the search which took place at the ruins, both Detective Hook and Frank's new-found cousin, Jerry Buck, whose true name proved to be Dupont Tisdale, assisted. By Jerry the presence of Mrs. Mansfield at the Three Oaks was made perfectly plain. Familiar with the house and its secret passages for years, she had, assisted by the boy, played the ghost most successfully, gliding in and out of the chamber of its former owner by means of a secret panel set in the wall, while the light--nothing more than the usual stage fire--was used to add effect to the scene at the suggestion of Jerry himself. They found the iron chest without difficulty, and the will having been placed in the hands of the Surrogate of New York County, its contents were turned over to that official to be dealt with according to the law. By the confession of Tisdale, all stain being removed from the name of our hero, in due time he came into his own.