Gerald stood back, flattened against the wall, as a man sprang to the doorway and flashed a lantern into the passage.
"All right," said the man, with almost a sob of relief. "It was only the door swung open, it's that heavy that's all."
"Blow the door!" said another growling voice; "blessed if I didn't think it was a fair cop that time."
They closed the door again. Gerald did not mind. In fact, he rather preferred that it should be so. He didn't like the look of those men. There was an air of threat about them. In their presence even invisibility seemed too thin a disguise. And Gerald had seen as much as he wanted to see. He had seen that he had been right about the gang. By wonderful luck beginner's luck, a card-player would have told him he had discovered a burglary on the very first night of his detective career. The men were taking silver out of two great chests, wrapping it in rags, and packing it in baize sacks. The door of the room was of iron six inches thick. It was, in fact, the strong-room, and these men had picked the lock. The tools they had done it with lay on the floor, on a neat cloth roll, such as wood-carvers keep their chisels in.
"Hurry up!" Gerald heard. "You needn't take all night over it."
The silver rattled slightly. "You're a rattling of them trays like bloomin' castanets," said the gruffest voice. Gerald turned and went away, very carefully and very quickly. And it is a most curious thing that, though he couldn't find the way to the servants wing when he had nothing else to think of, yet now, with his mind full, so to speak, of silver forks and silver cups, and the question of who might be coming after him down those twisting passages, he went straight as an arrow to the door that led from the hall to the place he wanted to get to.
As he went the happenings took words in his mind.
"The fortunate detective," he told himself, "having succeeded beyond his wildest dreams, himself left the spot in search of assistance."
But what assistance? There were, no doubt, men in the house, also the aunt; but he could not warn them.
He was too hopelessly invisible to carry any weight with strangers. The assistance of Mabel would not be of much value. The police? Before they could be got and the getting of them presented difficulties the burglars would have cleared away with their sacks of silver.