"Time me, gentlemen. Time me."

In the 1840s, these were the most famous words in London surgery. The man who said them was Robert Liston, the fastest knife in the West End. He could amputate a leg in under thirty seconds.

This was not a party trick. Before anaesthesia, every second a patient was under the knife, they were conscious and screaming. Two men held the patient down. A third held the limb. Liston cut. Speed was not showmanship. Speed was mercy.

He was six foot two and enormously strong. He could pin a thrashing patient's leg with one arm and cut with the other. Medical students packed the galleries of University College Hospital just to watch him work. They held pocket watches and counted.

His record was twenty-eight seconds. Skin to final stitch. The leg was off before some spectators realized the operation had begun.

But speed had consequences. In one operation, according to the widely cited account by medical historian Richard Gordon, Liston amputated so fast that he sliced through his assistant's fingers in the same stroke. The assistant later died of infection. The patient also died. And a spectator, whose coat was slashed by the blade, believed he had been stabbed and reportedly collapsed and died of shock. Three deaths from one operation. A 300 percent mortality rate. The only one in surgical history.

In another, he amputated a patient's leg in two and a half minutes but in his haste also removed the patient's testicles.

Liston knew what he was doing was brutal. Every surgeon of the era did. They operated on people who were wide awake, and the only variable they could control was time.

Then, on December 21st, 1846, Liston stood over a patient at University College Hospital. A rubber tube connected to a glass flask was placed over the patient's face. The flask contained ether. The patient went limp.

Liston performed the amputation. The patient did not scream. The patient did not move. The gallery fell silent.

When it was over, Liston looked up at the medical students and said five words: "This Yankee dodge beats mesmerism hollow."

The fastest knife in London had performed the first operation under modern anaesthesia in Europe. The man who spent his entire career racing against pain was the one who made the race unnecessary.

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