But he experienced more difficulty in the quest than he anticipated. No one was better acquainted with the obscure quarters and hiding-places of London than he; but in none of these retreats could he discover the object of his search. The potentates of Whitefriars and the Mint would not have dared to harbour such an offender as Mompesson, and would have given him up at once if he had sought refuge in their territories. But Osmond satisfied himself, by a perquisition of every house in those sanctuaries, that he was not there. Nor had any one been seen like him. The asylum for "masterless men," near Smart's Quay, and all the other dens for thieves and criminals hiding from justice, in and about the metropolis, were searched, but with the like ill result. Hitherto, Mompesson had contrived entirely to baffle the vigilance of his foe. At last, Osmond applied to Luke Hatton, thinking it possible his cunning might suggest some plan for the capture of the fugitive. After listening with the greatest attention to all related to him, the apothecary pondered for awhile, and then said--"It is plain he has trusted no one with his retreat, but I think I can find him. Come to me on the third night from this, and you shall hear further. Meantime, you need not relax your own search, though, if it be as I suspect, failure is sure to attend you." Obliged to be satisfied with this promise, Osmond departed. On the third night, at a late hour, he returned. He did not, however, find Luke Hatton. The apothecary, it appeared, had been absent from home during the last three days, and the old woman who attended upon him was full of uneasiness on his account. Her master, she said, had left a letter on his table, and on investigation it proved to be for Osmond. In it the writer directed him, in the event of his non-return before the time appointed, to repair without delay, well armed, to the vaults beneath Mompesson's old habitation near the Fleet, and to make strict search for him throughout them. He also acquainted him with a secret entrance into the house, contrived in the walls beneath the lofty north-eastern turret. On reading this letter, Osmond at once understood his ally's plan, together with its danger, and felt that, as he had not returned, he had, in all probability, fallen a victim to his rashness. Telling the old woman whither he was going, and that inquiries might be made there for him on the morrow, if he did not re-appear with her master, he set out at once for the place indicated. We shall, however, precede him.