The affair was illicit, and the child, Carl, was handed over for adoption to a family called Ebert.
Michael Ebert shared his father's love of classical music but also studied gestalt therapy at Esalen, the controversial California-based retreat centre and institute.
Despite the much bemoaned departure of band co-founder Jade Castrinos following their last full-length, Edward Sharpe and the Magnetic Zeros still had 10 different musicians packed on the tiny stage at Chicago’s Old Town School of Folk Music in an intricate intertwining of instruments and personality.
It was not immediately clear, however, if their eponymous, messianic leader himself would appear, as his name was crossed off the bill.
In the 1960s and 1970s, Esalen was part of the Human Potential Movement, which believed, to oversimplify, that society benefits if the inner self is freely expressed.
To this day you can see Michael Ebert, shot on Super 8, freely expressing his inner self at the start of the video to Edward Sharpe and the Magnetic Zeros' "Desert Song" on You Tube.