Our correspondent pens a letter of thanks to Sir David Attenborough, George III and some miraculous illustrators of natural history

The chances of any good coming of the Barbican’s Martian-themed show are a million to one

A highly original talent, Lucas Cranach has been rediscovered

The Courtauld’s Renoir exhibition reflects an era when the real drama at the theatre took place off stage

Derek Jarman at the Serpentine shows a visionary film-maker – but his paintings look nothing short of crude