Ah Ha my first post here..... As far as unreleased songs go....Here are a few and the albums they were left off of Sugar Mama ( Zep II ) Sunshine Woman ( Zep II) Slush ( HOTH ) Fire ( ITTOD ) Swan Song ( HOTH/PG ) Pat's Delight was the name of moby dick before it was changed.....some early versions of Zep II list it as Moby Dick ( Pat's Delight)....Pat is the name of bonhams wife Hey Hey has been available since 1970, it was the B-side to Immigrant Song and was also released on a EP along with 3 album tracks from Zep 3 and 4 dont remember what songs though.... I didnt list covers