Richard Dadd was a Victorian painter best known for his depictions of fairies and other supernatural subjects painted with obsessively minuscule detail.

Nicholas Tromans, author of The Artist and the Asylum, heads behind the scenes at Tate and Cambridge’s Fitzwilliam museum to tell us the tale of The Fairy Feller’s Masterstroke. He also treats us a rare look at Songe de la Fantasie, Dadd's watercolour version of the painting. Both artworks were painted while Dadd was living in psychiatric hospitals.