I got to know Michael Wharton in the early 1980s, when I was working as an editor at Chatto & Windus. We had commissioned him to write what turned out to be The Missing Will, the first volume of his autobiography, and every now and then I would meet him for a drink in the King and Keys, a narrow, smoke-filled pub next to the old Telegraph building in Fleet Street. It was usually half-empty when I went there during lunch breaks that continued well into the afternoon, but in the evenings, Michael told me, it was crammed to overflowing with his colleagues from the Daily Telegraph, red-faced and sweating and jostling for a place at the bar.