Hellzapoppin’
The 20th-century painter who called himself Balthus once proposed that a monograph about him should begin with the words ‘Balthus is a painter of whom nothing is known. Now let us look at the pictures.’ But while Balthus may have felt that far too much was known about his private life, Hieronymus Bosch is an artist about whom we truly know if not exactly nothing then very little that is personal or revealing. He adopted his name from his native town, ’s-Hertogenbosch, where his death 500 years ago is marked by a superb exhibition. Bosch (c.1450–1516) was christened Jheronimus — alternatively Joen or Jeroen — van Aken, came from a