Dramatic evidence has been unearthed of such systematic British brutality in the former colony of Kenya that it may require the rewriting of imperial history. Hitherto secret files show that the then colonial secretary, Alan Lennox Boyd, sanctioned a policy of violence towards interned guerrilla suspects. A former colonial official, Terence Gavaghan, now living in London, was, according to a memo written by the governor, Sir Evelyn Baring, authorised to use force. Some detainees allegedly had their mouths stuffed with mud and were beaten unconscious by his men.