It is the prototype that determines the large format, it is from the 16×26 cm dimension that the image is enlarged by the squaring system. Each part is painted separately then assembled to form the whole.
Mechanics of notation
The price (the coast) of a watercolor is calculated as indicated in chapter VIII. Each piece costs 55.5$ X 36 = 1998$, then at the second sale the watercolor will be increased by 1998$ or 3996$ and so on…