W----, I may take possession of my bank-note again." He took up all the notes which lay upon the table to search amongst them for his own. "Mine, you know, is stained," said Archibald. "But it is very singular," said Henry Campbell, who was looking over his shoulder, "that here are two stained notes. That which was found in the foreman's box is stained in one corner, exactly as yours was stained, Mr. Mackenzie." Macpherson, the tailor, now stooped to examine it. "Is this No. 177, the note that I sent in change, by my foreman, to M. Pasgrave? I'll take my oath it was not stained in that manner when I took it out of my desk. It was a new and quite clean note: it must have been stained since." "And it must have been stained with vitriolic acid," continued Henry. "Ay, there's cunning for you," cried Archibald. "The foreman, I suppose, stained it, that it might not be known again." "Have you any vitriolic acid in your house?" pursued Henry, addressing himself to the master-tailor. "Not I, indeed, sir; we have nothing to do with such things. They'd be very dangerous to us." "Pray," said Henry, "will you give me leave, Mr. W----, to ask the person who searched the foreman's box a few questions?" "Certainly sir," said Mr. W----; "though, I protest, I cannot see what you are driving at." Henry inquired what was found in the box with the bank-note. The man who searched it enumerated a variety of things. "None of these," said Henry, "could have stained the note: are you sure that there was nothing else?" "Nothing in the world; nothing but an old glass stopper, I believe." "I wish I could see that stopper," said Henry. "This note was rolled round it," said the man: "but I threw it into the box again. I'll go and fetch it, sir, if you have any curiosity to see it." "Curiosity to see an old stopper? No!" cried Archibald Mackenzie, with a forced laugh; "what good would that do us? We have been kept here long enough. I move that we go home to our dinners." But Dr. Campbell, who saw that Henry had some particular reason for wishing to see this glass stopper, seconded his son. The man went for it; and when he brought it into the room, Henry Campbell looked at it very carefully, and then decidedly said, fixing his eyes upon Archibald Mackenzie, who in vain struggled to keep his countenance from changing. "This glass stopper, Mr. Mackenzie, is the stopper of my father's vitriolic acid bottle, that was broken the night the cat was killed. This stopper has stained both the bank-notes. And it must have been in the pocket of your waistcoat." "My pocket!" interrupted Archibald: "how should it come into my pocket? It never was in _my_ pocket, sir." Henry pointed to the stain on his waistcoat. He wore the very waistcoat in question. "Sir," said Archibald, "I don't know what you mean by pointing at my waistcoat. It is stained, it is true, and very likely by vitriolic acid; but, as I have been so often in