Even at that time, I had not yet conquered my aversion to the dryness of a life of study. I would still be merrily disposed at times; and as my pleasures were (to say the least) undignified, and I was not only well known and highly considered, but growing toward the elderly man, this incoherency of my life was daily growing more unwelcome. It was on this side that my new power tempted me until I fell in slavery. I had but to drink the cup, to doff at once the body of the noted professor, and to assume, like a thick cloak, that of Edward Hyde. I smiled at the notion; it seemed to me at the time to be humorous; and I made my preparations with the most studious care. I took and furnished that house in Soho, to which Hyde was tracked by the police; and engaged as housekeeper a creature whom I well knew to be silent and unscrupulous. On the other side, I announced to my servants that a Mr. Hyde (whom I described) was to have full liberty and power about my house in the square; and to parry mishaps, I even called and made myself a familiar object, in my second character. I next drew up that will to which you so much objected; so that if anything befell me in the person of Dr. Jekyll, I could enter on that of Edward Hyde without pecuniary loss. And thus fortified, as I supposed, on every side, I began to profit by the strange immunities of my position.

Men have before hired bravos to transact their crimes, while their own person and reputation sat under shelter. I was the first that ever did so for his pleasures. I was the first that could thus plod in the public eye with a load of genial respectability, and in a moment, like a schoolboy, strip off these lendings and spring headlong into the sea of liberty. But for me, in my impenetrable mantle, the safety was complete. Think of it — I did not even exist! Let me but escape into my laboratory door, give me but a second or two to mix and swallow the draught that I had always standing ready; and whatever he had done, Edward Hyde would pass away like the stain of breath upon a mirror; and there in his stead, quietly at home, trimming the midnight lamp in his study, a man who could afford to laugh at suspicion, would be Henry Jekyll.

The pleasures which I made haste to seek in my disguise were, as I have said, undignified; I would scarce use a harder term. But in the hands of Edward Hyde, they soon began to turn toward the monstrous. When I would come back from these excursions, I was often plunged into a kind of wonder at my vicarious depravity. This familiar that I called out of my own soul, and sent forth alone to do his good pleasure, was a being inherently malign and villainous; his every act and thought centred on self; drinking pleasure with bestial avidity from any degree of torture to another; relentless like a man of stone. Henry Jekyll stood at times aghast before the acts of Edward Hyde; but the situation was apart from ordinary laws, and insidiously relaxed the grasp of conscience. It was Hyde, after all, and Hyde alone, that was guilty. Jekyll was no worse; he woke again to his good qualities seemingly unimpaired; he would even make haste, where it was possible, to undo the evil done by Hyde. And thus his conscience slumbered.