Although Jennings appeared to acquiesce in Mallow’s suggestion that the case should be abandoned, he had not the slightest intention of leaving the matter alone. His professional pride was irritated by the difficulties, and he swore that he would in some way learn the truth. Moreover, the matter did not only deal with the death of Miss Loach, but with the discovery of a coining gang. From various obvious facts connected with the Crooked Lane crime, Jennings made sure that such a gang was in existence, and that the factory had been in the unfinished house. Now that the house was burnt down, it would seem that the coiners had lost their city of refuge, and would probably give up their nefarious trade. As the gang — judging from the number of false coins circulated during the past five years — had been in existence for a long time, it was probable that the members had made sufficient money to retire from so dangerous a business.

“I wonder if the house was set on fire by this arrested man, out of revenge,” thought Jennings, as he dressed to go out, “or whether the gang, finding things were growing dangerous since the death of Miss Loach, ordered him to destroy the factory? I can hardly think that, as to preserve the secret, Miss Loach was assassinated. It is not likely that after paying so terrible a price, such destruction would be agreed upon. Certainly the factory may be removed to another place. Humph! I wonder if I can trace it. The best thing for me to do will be to go to Rexton and look at the ruins.”

So to Rexton the detective went, and found a large crowd round the wall of the park. This had been broken down in several places so as to admit the fire engines, and Jennings found a policeman on duty who had been one of the first to see the fire, and who had indeed summoned the brigade. On telling his name and position, the man was willing to state all he knew.

“I was on duty about eight o’clock,” he said officially. “There was a high wind blowing, but the night was fine and dry. While walking down Crooked Lane, intending to take the path to the station, I saw a light behind the wall of the park. Then a tongue of flame shot up, and it didn’t need much cleverness to see that the old house was on fire. Almost before I could collect my wits, sir, the place was in a blaze. You see the dry weather, the heat and the high wind, made everything blaze finely. I signalled for the brigade, and it came up as soon as possible. But as there is no gate in the wall, we had to break it down to get the engines in. There was a large crowd by this time, and we had all the help we needed. By this time the whole house was flaming like a bonfire. When we got the wall down the most part of the house was gone, and the fire had caught the surrounding shrubs, so all we could do was to halt on the edge of the mass and squirt water, in the hope of putting out the flames. But, Lord bless you!” said the officer with good-humored contempt, “you might as well have tried with a child’s squirt. As you see, sir, everything is gone within the wall. Leastways, all but that big oak near the wall.”

It was as the man said. House, trees, shrubs, even the grass had been swept away by the fierce flames. Within the walls which had secluded the place from the world was a blackened space covered with debris. Where the house had stood was a mound of twisted iron girders, charred beams and broken slates. And everywhere the wind was lifting the fine gray ashes and scattering them abroad, as though in sorrow for the destruction of the previous night. Jennings took all this in at a glance. Policemen were on guard at the various gaps in the wall, as no one was allowed to enter. But the detective, by virtue of his office, walked across the bare expanse with the inspector, and trod under foot the black ashes. There was nothing to be gained, however, by this inspection. All that could be seen were the destroyed park and the mound where the house had been. “What of the cellars?” asked Jennings.

“Well,” said Inspector Twining genially, “I suppose there are cellars, but there’s nothing in them. The house was shut up for years by a queer nobleman.”

“By Lord Caranby,” replied the detective. “I know. I suppose the cellars are under that heap. I must get Lord Caranby to allow me to clear it away.”

“I expect that will be done, whether or no. Lord Caranby came down and told one of our men that he intended to throw down the wall and let the place as a building site. So when the building begins the heap will soon be cleared away and the cellars laid bare. But there’s nothing there,” said the inspector again.

“I am not so sure of that.”

“What do you mean?”

“Nothing. I have an idea,” answered the detective, who did not wish to tell the man how he now began to fancy that the factory for safety had been placed in the cellars. “By the way, did this man who was arrested give his name?”

“No. He refuses to answer any questions. He was, as you know, Mr. Jennings, arrested for trying to pass a bad shilling, but there is no doubt he fired the place. The bottle of petroleum he had in his possession was empty, and —”

“Yes! I heard all that. Where is he now?”

The inspector named a place near Rexton where the man had been incarcerated, pending being brought before the magistrate. “I am going that way,” said the inspector. “If you like to come —”

“I’ll come,” said Jennings. “I intended to see this man. There has been a lot of talk about false coins being passed lately.”

Mr. Twining nodded, and began to tell of various cases which had taken place in the district. The two took the train to the place where the police station to which the inspector belonged was situated. It was now after twelve o’clock, and Jennings thought he would have some luncheon before going to the station. But, unexpectedly, a constable seeing the inspector, came hurriedly towards him, saluting as he spoke.

“Please, sir, you’re wanted at the station,” he said. “A message was sent to Rexton.”

“I have just come from Rexton. What is it?”

“That man who was arrested for coining, sir?”

“What about him?” asked the inspector, while Jennings listened with all his ears. He was far from expecting to hear the reply.

“He is dead, sir,” said the policeman.

“Dead! What do you mean? He was well enough this morning.”

“Well, sir, he’s dead now — poisoned!”

“Poisoned!” echoed Jennings, and thought —“Ha! here’s an undesirable witness got out of the way.” Then he followed in the wake of the inspector, who on hearing the news, hurriedly walked towards the police station. Here they found that the news was true. The constable left in charge of the office was greatly agitated, as it seemed he had been lax in doing his duty. But he made a faithful report.

“It was this way, sir,” he said, trying to speak calmly. “A boy of fifteen, very poorly dressed — in rags almost — came crying and asking for the prisoner. He said the prisoner was his father.”

“How did he know that, when the prisoner gave no name and was arrested only last night?”

“The boy — Billy Tyke his name is, so I suppose the father is called Tyke also — says his father went out last night. He was always a drunkard, and left the boy to starve. The boy followed him later, and knowing he would be on the burst, went to the public-house, where the man was arrested for passing the bad shilling. There, he was told that his father was in jail, and came here to ask us to let him see him.”

“You should have refused and have detained the boy. Well?”

“I was moved by the little chap’s tears,” said the constable, abashed, “so I let him go into the cell.”

“Were you with him?” asked the inspector sharply.

“No, sir. We left them alone for a few minutes. As the boy was so sad and cut up, I thought there would be no harm in doing that. Well, sir, the boy came out again in ten minutes, still crying, and said he would get a lawyer to defend his father. He did not believe his father had passed the money. Then he went away. Later — about half an hour later, we went into the cell and found the man lying groaning, with an empty bottle of whisky beside him. The doctor came and said he thought the man had been poisoned. The man groaned and said the young shaver had done for him. Then he became unconscious and died.”

Jennings listened to this statement calmly. He saw again the hand of the coiners. The person who controlled the members evidently thought that the man would blab, and accordingly took precautionary measures to silence him. Without doubt, the man had been poisoned, and the boy had been sent to do it. “What is the boy like?” he asked.

“Billy Tyke, sir?” said the constable, replying on a nod from his chief, to whom he looked for instructions, “a thin boy, fair and with red rims round his eyes — looks half starved, sir, and has a scarred mouth, as though he had been cut on the upper lip with a knife.”

Jennings started, but suppressed his emotion under the keen eyes of the observant Twining. He had an idea that he knew who the boy was, but as yet could not be sure. “I’ll cut along to the public-house where this man was arrested,” said Jenn............