A very rarely seen painting by the British artist Walter Sickert, which was once owned by the Hollywood “gangster” actor Edward G. Robinson, is going on sale in London on 26 September. Other works for sale from the Lucas collection include a Sickert pastel of a naked sex worker, which has not been displayed publicly since 1908. Sickert and the writer Viginia Woolf had an exchange about the Ashmolean’s version of Ennui after Woolf saw it. On sale too are several key Sickert works deriving from his eight-year stay in Dieppe, from 1898 to 1906, after his divorce. The Lucas collection includes more than 60 Sickert prints, works or paper and a few sketches, showing how the artist developed subject matters.