The customary inquest followed, and after careful examination of the various witnesses, and a visit to the place, the jury, by the coroner’s direction, returned a verdict of “wilful murder.”  Then the strange affair passed into the hands of the police.  The hounds of the law were laid upon the scent, and they were active enough in their efforts to run the Clareborough family down, but without success:  for they had suddenly disappeared from The Towers, as completely as they had from their town mansion, but what direction they had taken was not discovered.

They were “wanted” for the clearing up of the death of their two servants, whose bodies were identified by the domestics brought up from the country house; but the witness particularly sought for was the old housekeeper, who, it was presumed, would be able to give a pretty good account of the doings at the great mansion.  But she could not be found, and the suspicion at once arose that she had been murdered by the men who made the attack upon the safe after obtaining leave to go up to town on business.

Search was therefore made in the town mansion, and also in the adjoining house with the curious underground works, but without result, and the disappearance of the old lady’s body added to the mystery.

The family were wanted, too, soon after, upon another charge ­that of coining, for upon further investigation of the supposed wealth banked in the strong-room, it was found that the coins were base.

But it required a far more than superficial examination to prove this, official after official from the Mint declaring them to be genuine according to the ordinary tests.  Their weight was absolutely correct, the workmanship was perfect, and they gave forth a true ring, but upon every sovereign being broken in half, though there was nothing to see, the coin appearing to be of gold with the proper amount of hardening metal added, the application of the acid test showed that something was wrong.

The examination of the bars of metal supposed to be gold, and discovered in the underground place beneath the old professor’s house, gave the explanation, the two chests delivered by the railway company helping the matter, for after the police had removed a layer or two of old books, they came upon small oaken boxes containing ingots of the base metal used in the manufacture of the coin, these being of an ingeniously compounded alloy, whose constituents, after metallurgical analysis, the Mint authorities kept secret.

Examination of the cellarage proved quite startling, from the perfection of the dies, presses, and rolling mills, all of great power, beautifully made, but of foreign production.

There was a small furnace, too, with crucibles, and other paraphernalia, the most interesting find being the small ribbons of metal from which the round counter-like flats had been punched, and some pieces in a box ready for being pressed.

These last ribbons of metal proved to have been made from the base metal ingots, after the old fashion of producing silver plate ­before the introduction of the cheap electro-plating system ­by which the pure metal is deposited upon the base.

Old silver-plated goods were made by taking a bar of copper and placing at top and bottom a thin slip of pure silver, which was made to adhere to the copper by heat.  Then the silvered copper bar was passed through rolling mills till it was flattened to the necessary thickness, and came out with its due proportion of silver on both sides, ready for working up into shape, with the addition of pure silver finishings to the parts likely to be most worn.

The Clareboroughs’ sovereigns were, then, thus made, careful analysis proving that each ingot of alloy was prepared with the addition of one-half of pure gold, that is to say, one fourth part at top and bottom.  This was fixed in the furnace; then the ingots were rolled to the right thickness, the flats punched out, and afterwards passed through the die press, to come out so perfect that for years these coins ran current by thousands, even the banking companies receiving them without demur, and it was not till long after that Chester discovered that his two-hundred-guinea fee was all perfectly base.

The learned said the production of such coin was an impossibility, but the Clareboroughs proved to them that it was not, and the Mint authorities were puzzled by the perfection attained.  But at last it was remembered that about twenty years before, a very clever metallurgist and chemist, who had held a high position at the Mint, was discovered in an offence against the rules of the establishment, which resulted in his immediate discharge and degradation, he having escaped a criminal prosecution by the skin or his teeth.

This official had married a lady of the name of Clareborough, and it was suggested by an ingenious personage as being possible that to this man was due the manufacture of the base coinage.

The right nail was hit upon the head, for at the time when, some seven or eight years earlier, the Clareborough family were, through their wild expenditure, utterly penniless and hopelessly in debt, this man, after many experiments, so advanced his project that he laid it before James Clareborough, who jumped at the idea; his brother Dennis and cousin Robert, both helplessly aground and forced to enlist in cavalry regiments, eagerly joined, and in a very small way the coining was begun, but they were terribly crippled by the cost of each piece.  James Clareborough was for producing something cheap, saying that it was absurd to be making imitation sovereigns the material for each of which cost ten shillings; but his uncle’s theory was that only by the great perfection of the coins could success and immunity from discovery be assured.

The uncle had the support of the two younger men, and after a while the skill begotten from practice enabled them to produce the coins more rapidly; improved machinery was obtained from Belgium; four more impecunious members of the family were sworn in to join in the secret of what they called their private bank; and at the end of three years the mansion in Highcombe Street was taken, fitted up by foreign workmen, and by degrees the machinery brought in through the book-collector’s house, and all done without a suspicion being raised.

The generally-accepted idea in fashionable sporting circles was that the wealth of the Clareboroughs came from their clever gambling transactions, and many a speculator was ruined by trying to imitate them, notably their two servants.

The various difficulties in the Clareboroughs’ way dissolved upon being attacked; wealth rolled in as fast as they liked to make it, working hard under the guidance of their uncle, the professor, who kept the position of captain over them, for in spite of James Clareborough’s overbearing ways, he gave up, as did the others, feeling that everything depended upon their being united.  The old man’s occupancy of the adjoining house, where he made his genuine love for collecting old works act as a blind for the receiving of heavy cases of metal, served them well, and the servants never once had a suspicion that there was a communication between the two buildings, or that the stern old housekeeper was the professor’s wife.

Her part was well played, too.  She never left the town mansion when all the servants went down to The Towers.  And it was at these times that the young men came up frequently, ostensibly to visit Paris or attend meetings, but really to work hard in the well-fitted vaults to replenish the strong-room, whose contents they wasted fast.

Self-interest, as well as clannishness, held the family together.  Use had made the labour of production familiar, and they might have gone on for years in their life of luxury unchecked, but for the one weak link in their chain ­the strongest and most overbearing man among them.  His plainly-displayed passion for his cousin had been the cause or quarrel after quarrel with Robert Clareborough, one of which culminated in blows, the use of the revolver, and Marion rushing off, believing her brother dying, for the aid of the surgeon with whose name a recent case had made her familiar.

Of the further career of the family nothing more was known in England.  The police were indefatigable, but they had keen, shrewd men to deal with, and the culprits completely disappeared.  Suspicions were entertained that they might have had something to do with the distribution of a great deal of base coin in Germany, but it was never traced home to them, and to all intents and purposes the name of Clareborough soon died out and the mysterious business in Highcombe Street was forgotten.