Peter Murtagh remembers the noise from a “knock down” in The Irish Times, as his colleagues banged their desks in a journalistic tradition marking the retirement of a great when printers hit their metal benches with a hammer. It was April 11, 2019, a few days after his 66th birthday. Married to Moira and the father of two grown-up children, Murtagh was retiring after a career in journalism where he had practically done it all. Murtagh had made it on Fleet Street as editor with the Insights investigative team in the Sunday Times and spent eight years with The Guardian,…