He was pondering these problems one evening in a house of call in the Strand, and the obstinacy with which the persons he so ardently desired to meet hung back gave the modest tankard before him an additional touch of bitter. As it happened, he was alone in his compartment, and, without thinking, he uttered aloud the burden of his meditations. "How bizarre it all is!" he said, "a man walking the pavement with the dread of a timid-looking young man with spectacles continually hovering before his eyes. And there was some tremendous feeling at work, I could swear to that." Quick as thought, before he had finished the sentence, a head popped round the barrier, and was withdrawn again; and while Dyson was wondering what this could mean, the door of the compartment was swung open, and a smooth, clean-shaven, and smiling gentleman entered. "You will excuse me, sir," he said politely, "for intruding on your thoughts, but you made a remark a minute ago." "I did," said Dyson; "I have been puzzling over a foolish matter, and I thought aloud. As you heard what I said, and seem interested, perhaps you may be able to relieve my perplexity?" "Indeed. I scarcely know; it is an odd coincidence. One has to be cautious. I suppose, sir, that you would have no repulsion in assisting the ends of justice." "Justice," replied Dyson, "is a term of such wide meaning, that I too feel doubtful about giving an answer. But this place is not altogether fit for such a discussion; perhaps you would come to my rooms?" "You are very kind; my name is Burton, but I am sorry to say I have not a card with me. Do you live near here?" "Within ten minutes' walk." Mr. Burton took out his watch and seemed to be making a rapid calculation. "I have a train to catch," he said; "but after all, it is a late one. So, if you don't mind, I think I will come with you. I am sure we should have a little talk together. We turn up here?" The theatres were filling as they crossed the Strand, the street seemed alive with voices, and Dyson looked fondly about him. The glittering lines of gas-lamps, with here and there the blinding radiance of an electric light, the hansoms that flashed to and fro with ringing bells, the laden buses, and the eager hurrying east and west of the foot passengers, made his most enchanting picture; and the graceful spire of St. Mary le Strand, on the one hand, and the last flush of sunset on the other, were to him a cause of thanksgiving, as the gorse blossom to Linnæus. Mr. Burton caught his look of fondness as they crossed the street.