During a period of group inactivity, longtime associate Hubert Terheggen asked their producer Mike Vernon to select previously unreleased material for official release.
In stark contrast is van Leer's gentle jazz ballad "Focus V." "Out of Vesuvius" is an excerpt from a 1973 jam session, which would eventually evolve into a long composition like "Eruption".
"Red Sky at Night" features synthesised bass parts, and was recorded with vocals as "O Avondrood" (Oh Evening glow) on a Dutch music compilation.
Recorded in 1970, "Spoke the Lord Creator" was the band's first attempt at using "Brahms Variations on a Theme by Haydn" in a rock music context.
[3] The cover art shows the German World War II heavy cruiser "Admiral Hipper" recovering an Arado Ar 196 plane.