The East End of London, also known simply as the East End, is an area of London, England, east of the Roman and medieval walled City of London and north of the River Thames. Although not defined by universally accepted formal boundaries, the River Lea can be considered another boundary. For the purposes of his book, East End Past, Richard Tames regards the area as coterminous with the London Borough of Tower Hamlets: however, he acknowledges that this narrow definition excludes parts of southern Hackney, such as Shoreditch and Hoxton, which many would regard as belonging to the East End. Others again, such as Alan Palmer, would extend the area across the Lea to include parts of the London Borough of Newham; while parts of the London Borough of Waltham Forest and London Borough of Hackney are also sometimes included.