of those who live around me.'
Durham, mentally reviewing the words of the report, reconstructed the scene in his mind; and now, having come to the end of the lane where the iron post rested, he stood staring up at a place in the ancient wall where several bricks had decayed, and where it was possible, according to the statement of the man Poland, to climb up on to a piece of sloping roof, and thence gain the skylight through which Cohen had obtained admittance on the night of his death.
He made sure that his automatic pistol was in his pocket, questioned the dull sounds of the riverside for a moment, looking about him anxiously, and then, using the leaning post as a stepping-stone, he succeeded in wedging his foot into a crevice in the wall. By the exercise of some agility he scrambled up to the top, and presently found himself lying upon a sloping roof.
The skylight remained well out of reach, but his rubber-soled shoes enabled him to creep up the slates until he could grasp the framework with his hands. Presently he found himself perched upon the trap which, if his information could be relied upon, possessed no fastener, or one so faulty that the trap could be raised by means of a brad-awl. He carried one in his pocket, and, screwing it into the framework, he lifted it cautiously, making very little noise.
The trap opened, and up to his nostrils there stole a queer, indefinable odour, partly that which belongs to old Oriental furniture and stuffs, but having mingled with it a hint of incense and of something else not so easily named. He recognized the smell of that strange store-room, which, as Mr. Hampden, he had recently visited.
For one moment he thought he could detect the distant note of a bell. But, listening, he heard nothing, and was reassured.
He rested the trap back against the frame, and shone the ray of an electric torch down into the darkness beneath him. The light fell upon the top of a low carven table, dragon-legged and gilded. Upon it rested the model pagoda constructed of human teeth, and there was something in this discovery which made Durham feel inclined to shudder. However, the impulse was only a passing one.
He measured the distance with his eye. The little table stood beside a deep divan, and he saw that with care it would be possible to drop upon this divan without making much noise. He calculated its exact position before replacing the torch in his pocket, and then, resting back against one side of the frame, he clutched the other with his hands. He wriggled gradually down until further purchase became impossible. He then let himself drop, and swung for a moment by his hands before releasing his hold.
He fell, as he had calculated, upon the divan. It creaked ominously. Catching his foot in the cushions, he stumbled and lay forward for a moment upon his face, listening intently.
The room was very hot but nothing stirred.
VII. THE SCUFFLING SOUND
Detective Durham, as he lay there inhaling the peculiar perfume of the place, recognized that he had put himself outside the pale of official protection, and was become technically a burglar.
He wondered if Chief Inspector Kerry would have approved; but he had outlined this plan of investigation for himself, and knew well that, if it were crowned by success, the end would be regarded as having justified the means. On the other hand, in the event of detention he must personally bear the consequences of such irregular behaviour. He knew well, however, that his celebrated superior had achieved promotion by methods at least as irregular; and he knew that if he could but obtain evidence to account for the death of the man Cohen, and of the Chinaman Pi Lung, who had preceded him by the same mysterious path, the way of his obtaining it would not be too closely questioned.
He was an ambitious man, and consequently one who took big chances. Nothing disturbed the silence; he sat upon the divan and again pressed the button of his torch, shining it all about the low-beamed apartment and peering curiously into the weird shadows of the place. He calculated he was now in the position which Cohen had occupied during the last moments of his life, and a sense of the uncanny touched him coldly.
As he thought of the unnatural screams spoken of by Poland, some strange instinct prompted him to curl up his feet upon the divan again, as though a secret menace crawled upon the floor amid its many rugs and carpets.
He must now endeavour to reconstruct the plan upon which the American cracksman had operated. Poland had a persistent belief that Cohen had known where the fabled hoard of Huang Chow was concealed.
Durham began a deliberate inspection of the place. He thought it unlikely that a wily old Chinaman, assuming that he possessed hidden wealth, would keep it in so accessible a spot as this. It was far more probable that he had a fireproof safe in the room upstairs, perhaps built into the wall. Yet, according to Poland 's account, it was in this room and not in any other that death came to Diamond Fred.
The wall-hangings first engaged Durham 's attention. He moved them aside systematically, one after another, seeking for any hiding-place, but failing to find one. The door communicating with the outer office he found to be locked, but he did not believe for a moment that the office would be worthy of inspection.
There were cases containing jewelled weapons and cups and goblets inlaid with precious stones, but none of these seemed to have been tampered with, and all were locked, as was the big cabinet filled with snuff bottles.
Many of the larger pieces about the place contained drawers and cupboards, and these he systematically opened one after another, without making any discovery of note. Some of the cupboards contained broken pieces of crockery, and more or less damaged curios of one kind and another, but none of them gave him the clue for which he was seeking.
He examined the couch upon which Huang Chow had been seated when first he had met him, but although he searched it scientifically he was rewarded by no discovery.
A very fusty and unpleasant smell was more noticeable at this point than elsewhere in the room, and he found himself staring speculatively up the wide, carpeted stairs. Next he turned his attention to the lacquered coffin which occupied the corresponding recess to that filled by the couch. It was an extraordinarily ornate piece of lacquer work and probably of great value.
The lid appeared to be screwed on, and Durham stood staring at the thing, half revolted and half fascinated. He failed to discover any means of opening it, however, and when he tried to move it bodily found it very heavy. He came to the conclusion that all the portable valuables were contained in locked cases or cabinets, and out of this discovery grew an idea.
The case containing the snuff bottles stood too close to the wall to enable him t test his new theory, but a square case near the office door, in which were five of six small but almost priceless pieces of porcelain, afforded the very evidence for which he was looking.
Thin electric flex descended from somewhere inside the case down one of the legs of the pedestal, and through a neatly drilled hole in the floor, evidently placed there to accommodate it.
'Burglar alarm!' he muttered.
The opening of this case, and doubtless of any of the others, would set alarm bells ringing. This was not an unimportant discovery, but it brought him very little nearer to a solution of the chief problem which engaged his mind. Assuming that Cohen had opened one of the cases and had alarmed old Huang Chow, what steps had the latter taken to deal with the intruder which had resulted in so ghastly a death? And how had he disposed of the body?
As Durham stood there musing and looking down through the plate- glass at the delicate porcelain beneath, a faint sound intruded itself upon the stillness. It gave him another idea. Part of the floor was stone-paved, but part was wood.
Upon a portion of the latter, where no carpet rested, Durham dropped flat, pressing his
