RE: Four years later, Einhorn was involved in a more genuine controversy with the producers of Nancy McClernan's play Tam Lin, which resulted in legal action.[8]

The controversy began when Edward Einhorn registered a  derivative copyright on what he called a "blocking and choreography" script, completely without my authorization after he had a fee dispute with my production partner. A year later, when I produced my play TAM LIN he sued me on the basis that I was violating his (unauthorized derivative) copyright.

The Dramatists Guild published my article on the case "The Strange Case of Edward Einhorn v. Mergatroyd Productions" in its September-October 2006 edition of The Dramatist.