Tom hurried down at once, to find the ladder just as he had left it; and on entering the mill, closely followed by David, he looked round for traces of the burglarious work that must have been done.

But all was in its ordinary state in the workshop, and after a sharp investigation, Tom was on his way to the steps, when David looked at him in a half-injured way as if disappointed.

“What, arn’t nothing stole here, sir?”

“No; everything seems to be right,” replied Tom.

“Well, I should ha’ thought they’d ha’ took the spacklums or something while they was about it.”

But matters wore a different aspect upon the laboratory being reached. On the whole the place looked undisturbed, save that a rug or two had been kicked up, and a chair tilted over against the wall; but at the second glance Tom felt a thrill, for there facing him was the old walnut bureau, with its drawers open, and the contents tumbled over and over, the small top drawer to the right especially taking Tom’s attention, for it hung nearly out and was perfectly empty.

There had not been much in it, only a few papers, but one was the large cartridge paper envelope, which contained the documents given to him by his uncle when that strange visit was paid. These had evidently gone; what else had been taken it was impossible to say.

“They’ve been at it here, Master Tom, haven’t they?”

“I’m afraid so, David.”

“Then hadn’t I better go and fetch the policeman directly, sir?”