This paper deals with the results of field reconnaissance and pollen-analysis of peatbeds occurring in the Dune area near the city of The Hague (The Netherlands). Such peatbeds were known already to occur at the surface as filling of depressions (former beach plains) of the Older Dune system, outside the area covered by Younger Dunes. It could be shown that below the latter a very similar pattern of peat-filled depressions exists. Pollen-analysis and radiocarbon dating indicate that formation of Old Dune sand took place until about the beginning of our era, though it might in places have been interrupted by a forest-phase at the end of Subboreal times, around 1200 B.C. In part vegetation was characterised by dune-shrub, including not only Hippophaë but also commonly Juniperus. After the formation of the Older Dunes a period of reafforestation followed, which in the western-most coastal area came to an end by the formation of the Younger Dunes, which event in this area could be dated around 1000-1200 A.D.