perfect in all other respects, but one of the letters was defective—broken. That was the same letter, Mr. Viner, which was defective in the document which Cave showed to you gentlemen and spoke of previously in court!"
"Extraordinary!" muttered Viner. "What a piece of luck!"
"No, sir!" said Drillford, stoutly. "No luck at all—just a bit of good common-sense thinking on the part of a shrewd woman. But you'll want to know what we did. I was so absolutely certain of the truth of Miss Penkridge's theory that I immediately made preparations for a descent on Cortelyon's house. I got a number of our best men—detectives, of course—and we went round to Markendale Square, back and front. Inquiry showed that Cortelyon was out, but we'd scarcely got that fact ascertained when he drove up in a taxicab with Cave himself. They hurriedly entered the house—I myself was watching from a good point of vantage, and I saw that both men were, to say the least, anxious and excited. Then I began to make final preparations. But before I'd finished telling my men exactly what to do, another party drove up—your companion, Miss Wickham, Mrs. Killenhall. She too entered. Then I moved—quick. Some of us went to the front—I with the others went in by the back. We made straight for Cortelyon's surgery, and we were on him and the other two before they'd time to move, literally. The two men certainly tried to draw revolvers, but we were too many for 'em, and as they'd tried that game, I had 'em handcuffed there and then. It was all an affair of a moment—and of course, they saw it was all up. Now,
