The group that gave us the original version of "Walk Right In" (Rooftop Singers) Gus Cannon's Jug Stompers (Gus Cannon, Ashley Thompson, Noah Lewis) recorded "Prison Wall Blues" for Victor in 1930. John Sebastian's "Younger Girl" is remarkably similar.

Warmest Spring first released "Younger Girl" on Parkway Records in 1964.

In 1965 the John Sebastian composition was released on the Lovin' Spoonful (John Sebastian, Zal Yanovsky, Steve Boone and Joe Butler) debut album "Do You Believe in Magic"

The Critters (Don Ciccone later joined Frankie Valli & the Four Seasons then Tommy James & the Shondells, Bob Podstawski, Ken Gorka became owner of the Bitter End in Greenwich Village, Jim Ryan recorded with Carly Simon, Chris Darway and Jack Decker) issued the song in 1966 taking it into the top forty.