Heidegger's Experiment * That very singular man old Dr. Heidegger once invited four venerable friends to meet him in his study. There were three white-bearded gentlemen—Mr. Medbourne, Colonel Killigrew and Mr. Gascoigne—and a withered gentlewoman whose name was the widow Wycherly. They were all melancholy old creatures who had been unfortunate in life, and whose greatest misfortune it was that they were not long ago in their graves. Mr. Medbourne, in the vigor of his age, had been a prosperous merchant, but had lost his all by a frantic speculation, and was now little better than a mendicant. Colonel Killigrew had wasted his best years and his health and substance in the pursuit of sinful pleasures which had given birth to a brood of pains, such as the gout and divers other torments of soul and body. Mr. Gascoigne was a ruined politician, a man of evil fame—or, at least, had been so till time had buried him from the knowledge of the present generation and made him obscure instead of infamous.