Limited palette Frisian landscape with gray gouache (Daler Rowney brand), in addition Rembrandt pastels mostly in the clouds and transparent sepia, umber watercolors for the foreground.... gray primed panel as the foundation.

Today I saw some work by Salomon van Ruysdael (1602-1670, Haarlem) and was struck how thin and translucent the large water themed landscape was painted. He was the uncle of Jacob van Ruisdael considered one of the greatest landscape painters and a huge influence on Turner.