Bethlem's patients have included many creative people. Most famous was the painter Richard Dadd, who was committed to Bethlem in 1844, after being tried for the murder of his father. Dadd was to spend 20 years at the hospital and then a further 22 years in Broadmoor hospital, to where he was transferred in 1864.

Here he is shown at work on his masterpiece of fairy painting - Oberon and Titania. This painting is now owned by Lord Lloyd Webber, who is a keen collector of Dadd's works.