    Sentence 4: In which year did John  ISheepshanks donated a large collection of  paintings?    Sentence 2: In 1857 John Sheepshanks  donated 233 paintings, mainly by  contemporary British artists, and a similar  lhumber of drawings to the museum with  lthe intention of forming a 'A National  h Art’, a role since taken  artists represented are                   Henry Landseer,  Ikie, William Mulready, Wi  Frith, Millais and Hippolyte Delaroche.         