This time they had not so long to wait for success.  The drag was brought to the surface, but carrying in its clutches an entirely different object, and one with which the young secretary was totally unfamiliar, — a somewhat rusty revolver.

Mr. Merrick’s back was now towards Scott, but the latter saw him take something from his pocket which he seemed to compare with the revolver, at the same time remarking to the stranger, who was watching with an appearance of great interest,

“A pretty good find, Jim, pretty good!  However, we’ll have another try for that box, whatever it is.  It may amount to something or it may not, but it will do no harm to make a trial.”

Having let down the drag once more, he glanced at the house, then at his watch, saying, “No signs of any one astir; we’re all right for another hour yet.”

After a few more turns, Scott saw them suddenly pulling in the ropes, and once more the box appeared, rusty and covered with slime, but still familiar.  He at once sprang to his feet and sauntered carelessly down the walk, humming a tune and watching the occupants of the boat with an air of mild curiosity.  The stranger was the first to see him, and with an expression of evident disgust gave Merrick warning of his approach.  If the detective felt any annoyance he did not betray it as he turned and nodded to Scott in the most nonchalant manner possible, as though dragging the lake were an every-day occurrence.

“You’ve been fishing, I see,” said Scott, pleasantly.  “How did you make out?”

“Well, I’ve made this find which you see here,” answered Mr. Merrick, as the boat headed for shore.  “I don’t know yet what it is, but it has not lain long in the water, and it may be worth looking into.”

Scott made no reply until the detective had sprung ashore; then, as the latter proceeded to examine the box, leaving his companion to take care of the boat and drag, he said, in a low tone,-

“That is likely to prove an important discovery, Mr. Merrick.”

“You are familiar with it then?” queried the latter.

“I have seen it in Mr. Mainwaring’s safe.  That was the box in which he kept the old jewels that were stolen on the night of the murder.”

Mr. Merrick whistled softly and studied the box anew.  “Well, there are no jewels in it now, but we will open it.  There is no one up yet to let us into the house, so suppose we go to the stables; we’ll be safe there from intrusion.”

They proceeded to the stables, and, arriving there, Scott was puzzled to see Merrick’s companion at work and evidently perfectly at home.

“We are going to use your room a while, Matthews,” said Merrick, carelessly.  Then, noting the surprise on Scott’s face, he added, “This is Matthews, the new coachman, Mr. Scott.  I thought you knew of his coming.”

“At your service, sir,” said Matthews, respectfully lifting his cap in response to Scott’s greeting, while the latter inquired, as he and the detective passed up-stairs together,-