"I had no interest in hearing of the rich Mr. Topsparkle, and listened with the utmost indifference to those minuter details of his life which the company at the coffee-house discussed with a keen relish, merely because this young man happened to be inordinately rich. "It was not long after the advent of Mr. Topsparkle, and while the stories about his excellent manners and his worse than doubtful morals were still on every lip, that I met a young Frenchman at the coffee-house, whose conversation, addressed to a person at the next table, at once interested me. "They were talking of the latest discovery in chemistry, which had been made at Munich by the great Johann Becher; and by the Frenchman's conversation I gathered that he was a good practical chemist, and had an intelligence which went far beyond his actual knowledge. He was just the order of neophyte to interest a worker who longs for some younger mind with which to share his developing ideas. Almost for the first time since I had frequented the coffee-house I joined unasked in the conversation of two strangers. I ventured to correct an assertion of the Frenchman's, and he received my correction with a modesty that delighted me. I enlarged upon the subject, and his interest was so much engaged that he walked with me to my door, listening respectfully to all I could tell him. "We met again and again. The Frenchman told me that he had been educated as a chemist and apothecary, but, disliking the beaten tracks of medicine, had given up his profession, and was now maintaining himself by his attendance as secretary upon a travelling gentleman. I was so interested in the young man himself and his aspirations that I was entirely unconcerned as to his employer, and it certainly never occurred to me that he could be in the service of the rich Mr. Topsparkle. "I asked my new friend his name. 'Louis,' he told me. 'What, Louis only--no surname?' "He shrugged his shoulders. 'A waif, sir,' he said; 'there are many such in Paris.' "I was content to accept him as a waif, and to know him only as Louis. "After meeting him about a dozen times, I invited him to my laboratory, first exacting from him a promise that he should tell no one in Venice of anything that he saw there, or indeed of the existence of such a chamber under my son's roof.