When I saw the man with the red beard and brown bag turn down Foster Lane, which, as every Londoner knows, is a narrow side street at the back of the General Post Office, I felt that it was indeed a happy thought which had prevented me from changing my shoes when I received Grant’s summons in the morning. Had I been wearing my ordinary lace-ups I should have been in a dilemma, for they are not easy to remove in a hurry, and in that deserted place the echo of my following footsteps, had I been thus shod, could not have failed to reach the ear of the man I was shadowing. To have followed him boldly would have aroused his suspicions, whereas if I remained far enough behind to avoid running this risk, I incurred the greater risk of losing sight of him altogether. But for the purposes of shadowing, nothing could be better than the gutta-percha-soled shoes which I was wearing; and by keeping well in the shadow, and only flitting from doorway to doorway at such times as I judged it safe to make a move, I hoped to keep an eye upon Redbeard unseen. The result justified my anticipations, for when he reached the back of the General Post Office he stopped and looked hastily up and down the street, as if to make sure that he was unobserved. Not a soul was in sight, and I need scarcely say that I made of myself a very wafer, and was clinging like a postage stamp to the door against which I had squared myself. Evidently reassured, he put down his bag, opened it, and lifted out something that, from the stiff movement of his arms, appeared to be heavy. This he placed upon the ground, and so gingerly that I distinctly heard him sigh as he drew his hands away. Then he stood erect, puffed fiercely at his cigar until it kindled and glowed like a live coal, took it from his lips, turned the lighted end round to look at it, and stooped with it in his hand over the thing upon the ground. I saw an answering spark shine out, flicker for a moment and die away, and heard Redbeard mutter “Damnation! Hell!” through his teeth. The next instant I heard the spurt that told of the striking of a lucifer match, and saw him stoop again over the thing on the ground. A little point of light, which grew in size and brightness, shone out as I stood looking on half paralysed with horror. That he had fired the fuse of an infernal machine I had no doubt, and for one moment my limbs absolutely refused to move. I tried to call out, but gave utterance only to a silly inarticulate noise that was more like a bleat than a cry, and was formed neither by my lips nor tongue, but seemed to come from the back of my throat. The sound reached the ears of the man with the bag, however, for he came to an erect posture in an instant, looked quickly to right and to left, and then walked briskly away in the opposite direction.