Mr. Charles Phillipps was, as has been hinted, a gentleman of pronounced scientific tastes. In his early days he had devoted himself with fond enthusiasm to the agreeable study of biology, and a brief monograph on the Embryology of the Microscopic Holothuria had formed his first contribution to the belles lettres. Later, he had somewhat relaxed the severity of his pursuits, and had dabbled in the more frivolous subjects of palæontology and ethnology; he had a cabinet in his sitting-room whose drawers were stuffed with rude flint implements, and a charming fetish from the South Seas was the dominant note in the decorative scheme of the apartment. Flattering himself with the title of materialist, he was in truth one of the most credulous of men, but he required a marvel to be neatly draped in the robes of science before he would give it any credit, and the wildest dreams took solid shape to him if only the nomenclature were severe and irreproachable; he laughed at the witch, but quailed before the powers of the hypnotist, lifting his eyebrows when Christianity was mentioned, but adoring protyle and the ether. For the rest, he prided himself on a boundless scepticism; the average tale of wonder he heard with nothing but contempt, and he would certainly not have credited a word or syllable of Dyson's story of the pursuer and pursued unless the gold coin had been produced as visible and tangible evidence. As it was he half suspected that Dyson had imposed on him; he knew his friend's disordered fancies, and his habit of conjuring up the marvellous to account for the entirely commonplace; and on the whole he was inclined to think that the so-called facts in the odd adventure had been gravely distorted in the telling. Since the evening on which he had listened to the tale, he had paid Dyson a visit, and had delivered himself of some serious talk on the necessity of accurate observation, and the folly, as he put it, of using a kaleidoscope instead of a telescope in the view of things, to which remarks his friend had listened with a smile that was extremely sardonic. "My dear fellow," Dyson had remarked at last, "you will allow me to tell you that I see your drift perfectly. However, you will be astonished to hear that I consider you to be the visionary, while I am a sober and serious spectator of human life. You have gone round the circle, and while you fancy yourself far in the golden land of new philosophies, you are in reality a dweller in a metaphorical Clapham; your scepticism has defeated itself and become a monstrous credulity; you are in fact in the position of the bat or owl, I forget which it was, who denied the existence of the sun at noonday, and I shall be astonished if you do not one day come to me full of contrition for your manifold intellectual errors, with a humble resolution to see things in their true light for the future." This tirade had left Mr. Phillipps unimpressed; he