A fundamental change can be perceived in the work of Jan Henderikse in early 1959, when he was twenty years old. Henderikse moved from Delft to Cologne, and a little later to Düsseldorf. He also emerged from his early informal-painting phase and started to organize everyday materials into structurally or serially conceived assemblages. He glued discarded corks (natural and plastic), screw-top lids, parts of toys, bottles and tins, empty packaging and electrical components, ampoules, and spray cans into empty fruit crates, packing them right up to the top or loosely. The resulting structures resemble either a chaotic, post-informal allover composition or a serial arrangement of similar objects. This was the start of the approach that still characterizes the Dutch artist’s work today somewhere between chance and concept, ready-made and aesthetically defined structure, reality and idealization, as it is characteristic for the work of the dutch artist up to the present day.