Phillipps looked with inquiry into the street. The evening was darkening, and the pile of the Museum was beginning to loom indistinct before the lighting of the lamps, but the pavements were thronged and busy. The artist in chalks across the way was gathering together his materials, and blurring all the brilliance of his designs, and a little lower down there was the clang of shutters being placed in position. Phillipps could see nothing to justify Mr. Dyson’s sudden abandonment of his attitude of surveillance, and grew a little irritated by all these thorny enigmas.
‘Do you know, Phillipps,’ said Dyson, as he strolled at ease up and down the room, ‘I will tell you how I work. I go upon the theory of improbability. The theory is unknown to you? I will explain. Suppose I stand on the steps of St. Paul’s and look out for a blind man lame of the left leg to pass me, it is evidently highly improbable that I shall see such a person by waiting for an hour. If I wait two hours the improbability is diminished, but is still enormous, and a watch of a whole day would give little expectation of success. But suppose I take up the same position day after day, and week after week, don’t you perceive that the improbability is lessening constantly — growing smaller day after day. Don’t you see that two lines which are not parallel are gradually approaching one another, drawing nearer and nearer to a point of meeting, till at last they do meet, and improbability has vanished altogether. That is how I found the black tablet: I acted on the theory of improbability. It is the only scientific principle I know of which can enable one to pick out an unknown man from amongst five million.’
‘And you expect to find the interpreter of the black tablet by this method?’
‘Certainly.’
‘And the murderer of Sir Thomas Vivian also?’
‘Yes, I expect to lay my hands on the person concerned in the death of Sir Thomas Vivian in exactly the same way.’
The rest of the evening after Phillipps had left was devoted by Dyson to sauntering in the streets, and afterwards, when the night grew late, to his literary labours, or the chase of the phrase, as he called it. The next morning the station by the window was again resumed. His meals were brought to him at the table, and he ate with his eyes on the street. With briefest intervals, snatched reluctantly from time to time, he persisted in his survey throughout the day, and only at dusk, when the shutters were put up and the ‘screever’ ruthlessly deleted all his labour of the day, just before the gas-lamps began to star the shadows, did he feel at liberty to quit his post. Day after day this ceaseless glance upon the street continued, till the landlady grew puzzled and aghast at such a profitless pertinacity.
But at last, one evening, when the play of lights and shadows was scarce beginning, and the clear cloudless air left all distinct and shining, there came the moment. A man of middle age, bearded and bowed, with a touch of grey about the ears, was strolling slowly along the northern pavement of Great Russell Street from the eastern end. He looked up at the Museum as he went by, and then glanced involuntarily at the art of the ‘screever’, and at the artist himself, who sat beside his pictures, hat in hand. The man with the beard stood still an instant, swaying slightly to and fro as if in thought, and Dyson saw his fists shut tight, and his back quivering, and the one side of his face in view twitched and grew contorted with the indescribable torment of approaching epilepsy. Dyson drew a soft hat from his pocket, and dashed the door open, taking the stair with a run.
When he reached the street, the person he had seen so agitated had turned about, and, regardless of observation, was racing wildly towards Bloomsbury Square, with his back to his former course. Mr. Dyson went up to the artist of the pavement and gave him some money, observing quietly, ‘You needn’t trouble to draw that thing again.’
Then he, too, turned about, and strolled idly down the street in the opposite direction to that taken by the fugitive. So the distance between Dyson and the man with the bowed head grew steadily greater.
Story of the Treasure-house
‘There are many reasons why I chose your rooms for the meeting in preference to my own. Chiefly, perhaps because I thought the man would be more at his ease on neutral ground.’
‘I confess, Dyson,’ said Phillipps, ‘that I feel both impatient and uneasy. You know my standpoint: hard matter of fact, materialism if you like, in its crudest form. But there is something about all this affair of Vivian that makes me a little restless. And how did you induce the man to come?’
‘He has an exaggerated opinion of my powers. You remember what I said about the doctrine of improbability? When it does work out, it gives results which seem very amazing to a person who is not in the secret. That is eight striking, isn’t it? And there goes the bell.’
They heard footsteps on the stair, and presently the door opened, and a middle-aged man, with a bowed head, bearded, and with a good deal of grizzling hair about his ears, came into the room. Phillipps glanced at his features, and recognised the lineaments of terror.
‘Come in, Mr. Selby,’ said Dyson. ‘This is Mr. Phillipps, my intimate friend and our host for this evening. Will you take anything? Then perhaps we had better hear your story — a very singular one, I am sure.’
The man spoke in a voice hollow and a little quavering, and a fixed stare that never left his eyes seemed directed to something awful that was to remain before him by day and night for the rest of his life.
‘You will, I am sure, excuse preliminaries,’ he began; ‘what I have to tell is best told quickly. I will say, then, that I was born in a remote part of the west of England, where the very outlines of the woods and hills, and the winding of the streams in the valleys, are apt to suggest the mystical to any one strongly gifted with imagination. When I was quite a boy there were certain huge and rounded hills, certain depths of hanging wood, and secret valleys bastioned round on every side that filled me with fancies beyond the bourne of rational expression, and as I grew older and began to dip into my father’s books, I went by instinct, like the bee, to all that would nourish fantasy. Thus, from a course of obsolete and occult reading, and from listening to certain wild legends in which the older people still secretly believed, I grew firmly convinced of the existence of treasure, the hoard of a race extinct for ages, still hidden beneath the hills, and my every thought was directed to the discovery of the golden heaps that lay, as I fancied within a few feet of the green turf. To one spot, in especial, I was drawn as if by enchantment; it was a tumulus, the domed memorial of some forgotten people, crowning the crest of a vast mountain range; and I have often lingered there on summer evenings, sitting on the great block of limestone at the summit, and looking out far over the yellow sea towards the Devonshire coast. One day as I dug heedlessly with the ferrule of my stick at the mosses and lichens which grew rank over the stone, my eye was caught by what seemed a pattern beneath the growth of green; there was a curving line, and marks that did not look altogether the work of nature. At first I thought I had bared some rarer fossil, and I took out my knife and scraped away at the moss till a square foot was uncovered. Then I saw two signs which startled me; first, a closed hand, pointing downwards, the thumb protruding between the fingers, and beneath the hand a whorl or spiral, traced with exquisite accuracy in the hard surface of the rock. Here I persuaded myself, was an index to the great secret, but I chilled at the recollection of the fact that some antiquarians had tunnelled the tumulus through and through, and had been a good deal surprised at not finding so much as an arrowhead within. Clearly, then, the signs on the limestone had no local significance; and I made up my mind that I must search abroad. By sheer accident I was in a measure successful in my quest. Strolling by a cottage, I saw some children playing by the roadside; one was holding up some object in his hand, and the rest were going through one of the many forms of elaborate pretence which make up a great part of the mystery of a child’s life. Something in the object held by the little boy attracted me, and I asked him to let me see it. The plaything of these children consisted of an oblong tablet of black stone; and on it was inscribed the hand pointing downwards, just as I had seen it on the rock, while beneath, spaced