Premise: Erik Jacobsen (born May 19, 1940) is an American record producer, song publisher and artist manager. He is best known for his work in the 1960s with Tim Hardin, The Lovin' Spoonful, The Charlatans, Sopwith Camel, and later with Norman Greenbaum and Chris Isaak. Though semi-retired, Jacobsen continues to manage many of his published songs and masters for various uses.
Hypothesis: The Charlatans were a music group who were active during the 1960s