Ursula Moray Williams wrote and illustrated over 70 children's books in her lifetime. Born in 1911, she was one of identical twins, both of whom started to write and illustrate their own books at a young age. After spending time in France, Ursula's first book Jean Pierre was published when she was just twenty. Set in the Haute-Savoie region which she knew so well, it followed the adventures of a small boy and his pet goat.

Moray Williams wrote her most famous story, The Adventures of the Little Wooden Horse, in 1938, in which a little toy horse is separated from his toymaker 'uncle' and must endure many dangerous adventures before finally finding a happy ending. A few years later in, 1942, she went on to write Gobbolino, the Witch's Cat, which soon became a firm favourite with children.

Her books have been illustrated by Edward Ardizzone and Shirley Hughes, among others.

A new edition of Gobbolino, the Witch's Cat was published in February 2012 on the 70th anniversary of its publication, and Moray Williams' classic tale of courage and hope, The Adventures of the Little Wooden Horse, was reissued in October 2011.