And all the time he had a kind of presentiment that the old man was aware of the search being carried on after him, and was, consequently, hiding away, but, perhaps, keeping an eye upon his proceedings. It was impossible to give up, for he felt that the old man must at any cost be found; and at last he spent his days wandering dreamily about the streets, trying to solve the difficulty--watching the passers-by, and asking himself whether there were any means he had left untried-- whether there was any friend or acquaintance he could question as to his whereabouts. But Brettison had no friends or acquaintances, as far as he knew. He had been to his solicitor, who smiled, and said that his client was, in all probability, studying mosses or lichens in the Alps, and would come back some day; to his banker, who was reticent at first, and then, upon seeing his visitor's anxiety, readily stated that his cheques had been cashed quite lately, which proved him to be about, but where he could not say. Everything seemed to have been done, but still day after day Stratton traversed London streets in a never wearying search, trusting to chance to help him, though perfectly aware that he might go on for years and never meet the man he sought. Chance did aid him at last; for one day he had turned out of Fleet Street to go northward, and as he passed along the broad highway-- wishing that he could explain everything to Guest and bring other wits to his help, instead of fighting the weary battle in silence alone--he suddenly stepped out into the road to cross to the other side, to an old bookseller's shop, where the man made a specialty of natural history volumes. It was a shop where he and Brettison had often spent an hour picking out quaint works on their particular subjects, and he was thinking that possibly the man might have seen Brettison and be able to give him some information, when there was the rattle of wheels, a loud shout, and he sprang out of the way of a fast driven hansom. The driver yelled something at him in passing, by no means complimentary; but Stratton hardly heard it. He stood, rooted to the spot, gazing after the cab; for, in the brief moment, as he started away, he had caught sight of the pale, worn face of Brettison, whose frightened, scared gaze had met his. Then he had passed without making a sign, and Stratton was gazing after the cab in speechless horror, for upon the roof, extending right across, and so awkwardly placed that the driver half stood in his seat and rested his hands upon it with the reins, was a large, awkward-looking deal box, evidently heavy, for the cab was tilted back and the shafts rose high, as if the balance was enough to hoist the horse from the pavement.