Pennebaker would also film Dylan's subsequent tour of England in 1966, but while some of this work has been released in different forms (supplying the framework for Martin Scorsese's Dylan documentary, "No Direction Home", and re-edited by Dylan himself in the rarely distributed "Eat the Document"), Pennebaker's own film of the tour ("Something Is Happening") remains unreleased. Nevertheless, the tour itself has become one of the most celebrated events in rock history, and some of the Nagra recordings made for Pennebaker's film were later released on Dylan's own records. All of the Nagra recordings made during the 1966 European appearances were made by Richard Alderson, who, for years, never received recognition. All of his tapes are what comprise the 36-CD box set "Bob Dylan: The 1966 Live Recordings", released in 2016. It is Alderson who notes that many of the UK concerts were, in fact, filmed by Howard Alk.