In one corner were three large dynamos, and in another a smelting pot, and many sheets of silver and copper. Also, there were moulds of gutta-percha arranged to hold coins in immersion. On a bench were a number of delicate tools and a strong vice. Jennings also saw various appliances for making coins. On rough deal shelves ranged round the walls stood flasks and jars containing powders, with tools and a great many chemicals. Also there were piles of false money, gold and silver and copper, and devices for sweating sovereigns. In a safe were lumps of gold and silver. Beside it, a bath filled with some particular liquid used in the trade. Electric cells, acids, wooden clips to hold the coins could also be seen. In fact the whole factory was conducted on the most scientific principles, and Jennings could understand how so many cleverly-prepared coins came to be in circulation. There were even moulds for the manufacture of francs and louis. "I daresay the gang have other places," he said to Atkins, "but this is their headquarters, I fancy. If I can only get some of them to tell the truth we might find the other places." "Hale wants to confess." "Yes. But I fancy it is about the murder of Miss Loach. She was apparently killed to ensure the safety of this den. We must root the coiners out, Atkins. Maraquito, who is the head of the business, is at large, and unless we can take her, she will continue to make false money in some other place. However, I have seen enough for the time being. Keep guard over this place till we hear from the Yard tomorrow." "You'll go home and lie down, sir." "No. I intend to hear Hale's confession. By to-morrow it will be too late. I wouldn't miss hearing what he has to say for anything." "But can you keep up, sir?" "Yes, yes--don't bother," said Jennings, rising, the pain making him testy, "give me your arm, Atkins. By the way, where does the other passage lead to? I have not enough strength to explore." "It leads to the top of the ground, sir, and comes out into the trunk of a tree." "What do you mean?" "Well, sir, it's very clever. There's an old oak near the wall, and the trunk is hollow. All anyone has to do is to climb up through the trunk by means of stairs and drop over the wall. The coiners were making for that when we captured them." "Humph! Have that place watched. Maraquito may come here to-night after all. It is now one o'clock." "I don't think she'll come, Mr. Jennings. But we have every point watched. No one can come or go unless we know." "Come along then," said Jennings, who was growing weak, "let us see Hale. The sooner his confession is written and signed the better." Not another word did Jennings say till he got on to the ground floor of the villa. But he had been thinking, for when there he turned to the man who supported him. "How is it the oak with the hollow trunk still stands?" he asked.