The watercolour effect
The rainbow plate seen above right comes from an 1814 first issue* of David Cox’s Treatise on landscape Painting and Effect in Watercolours, an oblong folio work that incorporates a hand-coloured aquatint frontispiece and 31 plates (15 coloured, 15 in sepia) as well as 24 soft ground etchings.
In rebacked contemporary half calf and showing a few minor stains, a copy of this important early dr…