"I am to judge what is foolish and what wise, M. Bouvier. Good evening!"
"Good evening, M. Dorrington; good evening." Bouvier followed him out to the gate. "And will you tell me—do you think there is a way to get the diamond? Have you any plan?"
"Oh yes, M. Bouvier, I have a plan. But, as I have said, that is my business. It may be a successful plan, or it may not; that we shall see."
"And—and the dossier. The notes that you so marvellously have, written out in the book you read. When this business is over you will destroy them, eh? You will not leave a clue?"
"The notes that I have in my books," answered Dorrington, without relaxing a muscle of his face, "are my property, for my own purposes, and were mine before you came to me. Those relating to you are a mere item in thousands. So long as you behave well, M. Bouvier, they will not harm you, and, as I said, the confidences of a client are sacred to Dorrington & Hicks. But as to keeping them—certainly I shall. Once more—good evening!"
Even the stony-faced Dorrington could not repress a smile and something very like a chuckle as he turned the end of the street and struck out across Golden Square towards his rooms in Conduit Street. The simple Frenchman, only half a rogue—even less than half—was now bamboozled and put aside as effectually as his cousin had been. Certainly there was a diamond, and an immense one; if only the Bouvier tradition were true, probably the famous "Mirror of Portugal"; and nothing stood between Dorrington and absolute possession of that diamond but an ordinary sort of case such as he dealt with every day. And he had made Bouvier pay a fee for the privilege of putting him completely on the track of it! Dorrington smiled again.
His dinner was spoilt by waiting, but he troubled little of that. He spread before him, and examined again, the pieces of glass and the cork. The bottle had been a druggist's ordinary flat bottle, graduated with dose-marks, and altogether seven inches high, or thereabout. It had, without a doubt, contained the chloroform wherewith Léon Bouvier had been assaulted, as Dorrington had judged from the smell of the cork. The fact of the bottle being corked showed that the chloroform had not been bought all at once—since in that case it would have been put up in a stoppered bottle. More probably it had been procured in very small quantities (ostensibly for toothache, or something of that kind) at different druggists, and put together in this larger bottle, which had originally been used for something else. The bottle had been distinguished by a label—the usual white label affixed by the druggist, with directions as to taking the medicine—and this label had been scraped off; all except a small piece at the bottom edge by the right hand side, whereon might be just distinguished the greater part of the letters N, E. The piece of glass that had lain a little way apart from the bottle was not a part of it, as a casual observer might have supposed. It was a fragment of a concave lens, with a channel ground in the edge.
III
At ten precisely next morning, as usual, Mr. Ludwig Hamer mounted the stairs of the house in Hatton Garden, wherein he rented half a room as office. He was a tall, fair man, wearing thick convex pince-nez. He spoke English like a native, and, indeed, he called himself an Englishman, though there were those who doubted the Briticism of his name. Scarce had he entered his office when Dorrington followed him.
The room had never been a very large one, and now a partition divided it in two, leaving a passage at one side only, by the window. On each side of this partition stood a small pedestal table, a couple of chairs, a copying-press, and the other articles usual in a meagrely furnished office. Dorrington strode past Bouvier's half of the room and came upon Hamer as he was hanging his coat on a peg. The letter of introduction had been burnt, since Dorrington had only asked for it in order to get Hamer's name and the Hatton Garden address without betraying to Bouvier the fact that he did not already know all about it.