Dear Editor, Praises on an intelligent, thoughtful article on a truly underappreciated artist [“The True One,” Music, June 30]. I am not easily convinced of the genius of obscure individuals. but, in Gene Clark's case, I have become an ardent convert. While there have been many equally memorable pop/folk/rock/country songwriters, none has possessed the vocal quality of Clark. While his voice is not classically pure, its plaintive quality ranging from baritone to tenor is perhaps one of the most affecting in the whole musical canon.