Earth And Fire

Pop band from Voorschoten / Voorburg, Netherlands.
The group featured female vocalist Jerney Kaagman, twin brothers Chris and Gerard Koerts (Chris handled the guitars and Gerard handled the keyboards), bassist Hans Ziech, and drummer Ton v.d. Kleij. Earth & Fire had quite a few hits, like "Seasons" (1969), "Ruby is the One" (1970), "Wild & Exciting" (1970), "Invitation" (1971, released only as a single at that time), "Memories" (1972), and many more. In fact, Song of the Marching Children had a Dutch hit as well, "Storm & Thunder" (but was edited for single release). When this album came out, the band started to include the Mellotron and synthesizers to their keyboard setup (as well as the Hammond organ, which they used from the beginning), as well as including a side-long epic.
Earth & Fire were able to make some great albums in the process. The early Atlantis (1973) and Song of the Marching Children (1971), are recommended. To the World of the Future (1975) finds the band exploring more synthesizers, and Disco tendencies were starting to surface. Other albums are Gate to Infinity (1977), Reality Fills Fantasy (1979), Andromeda Girl (1981), In State of Flux (1982), and their 1989 reunion album Phoenix.