Peregrin Took
As well as Michael Moorcock and Brian Eno, Calvert's collaborators included Arthur Brown, Steve Peregrin Took, Jim Capaldi, Steve Pond, Inner City Unit, Vivian Stanshall, Nektar, John Greaves, Adrian Wagner, Amon Düül II and, posthumously, Spirits Burning, Dave Brock, and Krankschaft.