'During the Plague Year, when we lodged at Epsom, I held candles for Mr. Hooke while he dissected the bodies of diverse creatures – humans included. By then I had enough skill that I could dissect most parts of most creatures. But I was always baffled by necks, and by those few inches around the bladder. Those parts had to be left to the superior skill of Mr. Hooke. All those orifices, sphincters, glands, frightfully important bits of plumbing – '