“You understand?” she said eagerly. “Don’t give the note to the man unless he says ‘Rosie’ in reply to the word ‘Campbell.’” “All right--all right!” said Lady Molly, slipping the note into her reticule. “And you go up to your room, Miss Campbell; it’s no good giving that old fool Tredwen too much to gossip about.” Rosie Campbell went upstairs, and presently my dear lady and I were walking rapidly down the badly-lighted street. “Where is the man?” I whispered eagerly as soon as we were out of earshot of No. 34. “There is no man,” replied Lady Molly, quickly. “But the West End shop thief?” I asked. “He hasn’t been caught yet, and won’t be either, for he is far too clever a scoundrel to fall into an ordinary trap.” She did not give me time to ask further questions, for presently, when we had reached Reporton Square, my dear lady handed me the note written by Campbell, and said: “Go straight on to the Scotia Hotel, and ask for Miss Marvell; send up the note to her, but don’t let her see you, as she knows you by sight. I must see the chief first, and will be with you as soon as possible. Having delivered the note, you must hang about outside as long as you can. Use your wits; she must not leave the hotel before I see her.” There was no hansom to be got in this elegant quarter of the town, so, having parted from my dear lady, I made for the nearest Underground station, and took a train for South Kensington. Thus it was nearly seven o’clock before I reached the Scotia. In answer to my inquiries for Miss Marvell, I was told that she was ill in bed and could see no one. I replied that I had only brought a note for her, and would wait for a reply. Acting on my dear lady’s instructions, I was as slow in my movements as ever I could be, and was some time in finding the note and handing it to a waiter, who then took it upstairs. Presently he returned with the message: “Miss Marvell says there is no answer.” Whereupon I asked for pen and paper at the office, and wrote the following brief note on my own responsibility, using my wits as my dear lady had bidden me to do. “Please, madam,” I wrote, “will you send just a line to Miss Rosie Campbell? She seems very upset and frightened at some news she has had.” Once more the waiter ran upstairs, and returned with a sealed envelope, which I slipped into my reticule. Time was slipping by very slowly. I did not know how long I should have to wait about outside in the cold, when, to my horror, I heard a hard voice, with a marked Scotch accent, saying: “I am going out, waiter, and shan’t be back to dinner. Tell them to lay a little cold supper upstairs in my room.” The next moment Miss Marvell, with coat, hat, and veil, was descending the stairs. My plight was awkward. I certainly did not think it safe to present myself before the lady; she would undoubtedly recollect my face. Yet I had orders to detain her until the appearance of Lady Molly.