A retrospective of works by Henry Moore opens at London’s Osborne Samuel gallery on Friday, 22 May (until 27 June). The selling exhibition of around 60 pieces was a good two years in the making, according to the gallery’s co-owner, Peter Osborne. He says that its “catalyst” was the previously unseen collection of Moore’s sister, Elizabeth (Betty) Howarth of works given to her in the 1920s and 1930s.