Leonard Allen, name-checked on the cover of "Freak Out!" (1966) under the heading "These People Have Contributed Materially In Many Ways To Make Our Music What It Is. Please Do Not Hold It Against Them", was a boyhood friend of FZ, when he was living in Edgewood (15 Dexter Street), Maryland.
FZ in "The Real Frank Zappa Book" (1989): "Edgewood, Maryland, was sort of out in the country. It had a little woods and a creek with crawdads in it, just at the end of Dexter Street. I used to play down there with Leonard Allen."