Looking at the music of Dutch rock band Focus, started in the late sixties by Thijs Van Leer (b /31/03/48) with Jan Akkerman (b 24/12/46). Van Leer still performs and records under the name today (official site here). Akkerman's site here.
Classical musician Wouter Möller turns out to be the previously uncredited cello player on the very early track Happy nightmare (mescaline).
Focus is the best of all bands They are based in the Netherlands Their mainstay is called Thijs van Leer They play their music far and near They play mostly instrumental Sometimes rowdy, sometimes gentle.