When the banquet broke up I hurried out ahead of the others and posted myself at the top of the staircase leading down to the side door of the street. The Prince's carriage--an ordinary cab--was ordered to this door to escape the crowd and to avoid any delay. This I learned from my old friend Alcorn of the Central Office, who was in charge of the detectives at the dinner, and who in answer to my request said: "Certainly I'll let you through. Come alone, and don't speak to me as you go by. I'll say you're one of us. The crowd thinks he's going out by the other door, and you can get pretty close to him." The Prince came first, wrapped in furs--the black-bearded Russian at his side in overcoat, silk hat and white gloves. The Ambassador and the others had bidden them good-night at the top of the staircase. Under Alcorn's direction I had placed myself just inside the street door where I could slip out behind the Prince and his black-bearded companion. As a last resort I determined to walk straight up to him and say: "You haven't forgotten me, Mr. Bing, have you?" If I had changed so as to need proof of my identity Alcorn would furnish it. Whatever his answer, his voice would solve my mystery. He walked down the stairs with an easy, swinging movement, keeping a little behind the Prince; waited until Alcorn had opened the street door and with a nod of thanks followed Polinski out into the night. Once outside I shrank back into the shadow of the doorway and held my breath to catch his first spoken word--to the coachman--to the Prince--to any one who came in his way. At this moment a man in a slouch hat and poorly dressed, a light cane under his arm, evidently a tramp, hurried across the street to hold the cab door. I edged nearer, straining my ears. The Prince bent his head and stooped to enter the cab. The tramp leaned forward, shot up his right arm; there came a flash of steel, and the next instant the tramp lay writhing on the sidewalk, one hand twisted under his back, the other held in the viselike grip of the black-bearded man. Alcorn rushed past me, threw himself on the prostrate tramp, slipped a pair of handcuffs over his wrists, dragged him to his feet, and with one hand on his throat backed him into the shadow of the side door. The Prince smiled and stepped into his carriage. The black-bearded man dusted his white gloves one on the other, gave an order in a low tone to the coachman, took his place beside his companion and the two drove off.