“The Bibliography of British and Irish History provides bibliographic data on historical writing dealing with the British Isles, and with the British Empire and Commonwealth, during all periods for which written documentation is available – from 55BC to the present. It is the successor to the Royal Historical Society Bibliography of British and Irish History.”
The Bibliography aims to be as comprehensive as is practical for publications since 1900. Data from the London’s Past Online and Irish History Online has been added, and the Scottish Historical Review Trust has been involved as well.
Check out the 53 “Robin Hood, legendary outlaw” entries.