The only aspect of the incident which appealed to Whyland was the counter itself. He had submitted it to the experts at Scotland Yard, together with the notes which he had made in red ink in Mr. Copperdock’s office, and they had given it as their opinion that the figure upon it had been drawn with the same ink as that in which the notes had been written, and by a similar pen. Further, this pen and ink corresponded with those which had been used on the previous counters, in the cases in which they had been preserved. The more the Inspector considered it, the more convinced he became that Mr. Copperdock was at the bottom of the business. But how to bring it home to him? That was the difficulty.