Dr. Jekyll And Mr. Hyde 1908 -

He raised the glass to his lips. The formula was three times stronger than usual. He had calculated the dose precisely.

He was forty-seven. His hair was silver at the temples, his hands steady, his reputation as solid as the Portland stone of his townhouse. He had dined with the Prince of Wales twice. His paper on spinal reflexes had been read in Berlin. And he was dying of boredom. Dr. Jekyll And Mr. Hyde 1908

The change took seventeen seconds.

At noon, for no reason Hyde could articulate, the transformation reversed. Jekyll woke on the floor of his Harley Street study, wearing a bloodstained shirt that was not his, holding a lock of hair that had been cut from a living woman’s head. He raised the glass to his lips