These poets included Roy Fisher, Gael Turnbull, Ian Hamilton Finlay, Bob Cobbing, Jeff Nuttall, Tom Raworth, Michael Horovitz, Eric Mottram, Peter Finch, Edwin Morgan, Jim Burns, Elaine Feinstein, Lee Harwood, and Christopher Logue. Many of these poets joined Allen Ginsberg and an audience of 7,000 people at the Albert Hall International Poetry Incarnation on 11 June 1965 to create what has often been claimed as the first British happening. Earlier British happenings included John Latham's event-based art and Skoob Tower ceremonies; Gustav Metzger's 1964 auto-destructive art; Adrian Henri's 1962 collage-events in Liverpool's The Cavern Club; and Jeff Nuttall's events in Better Books. They had their roots in Dada events at the Cabaret Voltaire (Zurich) at the start of the century.