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This thread came up in a search whilst looking for something else - there are a couple of maps at Kew that show Veruyden's drained areas from 1633 (actually pre-dates the Aerlebout map by 6 years). These maps indicate where houses were built on the levels and I keep meaning to do some more work on them. As you say Abraham' De La Prymes House was where Valkenburgh built his house. I attach an extract from one of the maps showing the levels. Note North is to the left of the map. The Valkenbugh house can be seen just to the right and below the (2) in the middle.