"I'm So Glad" is a song originally recorded by Skip James in 1931. The song is derived from a song written in 1927 by Art Sizemore and George A. Little entitled "So Tired" and first recorded that same year by Curley Huber. It was covered by Cream on their first album, Fresh Cream, then later put on their last studio album Goodbye as a live performance. It was also covered by Deep Purple on their first album Shades of Deep Purple and by Yuya Uchida and the Flowers on their debut album Challenge. Deep Purple's version is introduced by their own arrangement called "Prelude: Happiness". The Skip James-song itself starts after a medley consisting of excerpts from the instrumental arrangement of Rimsky-Korsakov's classical Scheherezade. This medley named "Prelude: Happiness", stretches the song