My brother Peter, who has died aged 79, was emeritus professor and a former head of the American studies department at Nottingham University. His work there led to him becoming an internationally respected authority on Mark Twain.
He published dozens of articles and several books on the American author, including The Short Works of Mark Twain: A Critical Study (2001), The Cambridge Introduction to Mark Twain (2012), and Mark Twain and Male Friendship: The Twichell, Howells and Rogers Friendships (2009), which won both the EAAS American Studies Network book prize and the British Association for American Studies (BAAS) annual book prize. Pete also edited a collection of Twichell’s civil war letters.