"I'm sure the door was shut," debated Mr. Dale, in a tone as if he were not sure, but rather sought to persuade himself that he was so. "Only Wilks was in, that morning; the other two had gone out."

"Rely upon it that's how it happened. The door could not have been quite closed."

"Well, I don't know. I generally shut it myself, and carefully too, when important clients are in here. I confess," honestly added Mr. Dale, "that it's the only explanation I can see in the matter. If the door was unlatched, Wilks might have heard. I had him in last night, and taxed him with it. He denies it out and out: says that, even if the affair had come to his knowledge, he knows his duty better than to have talked about it."

"I don't doubt that he does, when in his sober senses. But he is not always in them."

"Oh, come, Mr. Richard North, it is not as bad as that."

Richard was silent. If Mr. Dale was satisfied with his clerk and his clerk's discretion, he had no desire to render him otherwise.

"He takes too much now and then, you know, Mr. Dale; and he may have dropped a word in some enemy's hearing: who perhaps caught it up and then wrote the letter. Would you mind my questioning him?"

"He is not here to be questioned, or you might do it and welcome," replied Mr. Dale. "Wilks is lying up to-day. He has not been well for more than a week past; could hardly do his work yesterday."

"I'll take an opportunity of seeing him then," said Richard. "My father won't rest until the writer of this letter has been traced; neither, in truth, shall I."

The lawyer said good-morning to his visitor, and returned to his desk. But ere he recommenced work, he thought over the chief subject of their conversation. Had the traitor been Wilks, he asked himself. What Richard North had said was perfectly true--the young man sometimes took too much after work was over. But Mr. Dale had hitherto found no reason to complain of his discretion; and, difficult as it seemed to find any other loophole of suspicion, he finally concluded that he had no reason to do so now.