Boudewijn de Groot - Nacht en Ontij (1969)
If Picknick was Boudewijn's Sgt. Pepper, this is his Thick as a Brick. While not quite as masterfully crafted as that record, there does seem to be some kind of fantasy narrative here, and I'm sure I'll gain a greater understanding of what it is as my Dutch improves.
Most of this album is taken up by the 25-minute epic "Heksensabbath", which actually consists of lots of fairly short parts, some with very little musical content. At times, it's just Boudewijn delivering a monologue to the sound of a thunderstorm or a beating drum. At others, multiple clashing melodies are mixed together in odd ways. Wikipedia says this album was inspired by an LSD trip, and I'm inclined to believe that.
The other tracks are "Babylon", which started the album on the original vinyl, and "Wie Kan Me Nog Vertellen"/"Aeneas Nu", which made up a separate single back in 1969 and were grafted onto the start of this album for the CD release. They're all enjoyable, but nothing to write home about.
The one thing all of these pieces have in common is that they are significantly darker than de Groot's previous work. It seems like he was making a conscious effort to leave behind the hippy image he had crafted for himself with his popular protest song "Welterusten Mijnheer de President" and Picknick, and create something more musically serious. In any case, I'm rapidly learning that Boudewijn is not a one-trick pony as his debut album would suggest, and that each new album contains new surprises. I'm looking forward to his '70s work.