The Butler Collection is a collection of children's literature which had been created by Mary Thwaite and further developed by Joan Butler, both librarians for Hertfordshire Library Services. It was jointly acquired by the Robinson Library and Seven Stories, the Centre for Children's Books.The collection includes eighteenth-century pamphlets and books such as Young, Rev. J. The perils of Paul Percival or the Young Adventurer (c.1841), Ballantyne, R.M. The gorilla hunters: a tale of the wilds of Africa (1897), Banks, A. Cheep and chatter or lessons from field and tree (1884) and works by such well-known children's writers as Hans Christian Andersen, J.M. Barrie, Frances Hogson Burnett, James Fenimore Cooper and Daniel Defoe as well as books illustrated by Randolph Caldecott.