Cox, David: A series of progressive lessons intended to elucidate the art of painting: with introductory illustrations on perspective and drawing with pencil (London, 1845)

DUTCH BOATS on the SCHELDT, off ANTWERP.


The sky cobalt ; the clouds yellow ochre, and a little
vermilion ; the darker tint upon the clouds, cobalt, and vermilion
; when quite dry, the whole of the sky may have a very light wash of
yellow ochre passed over it, the water indigo, and yellow ochre ; the
sails; one burnt sienna, and vermilion ; the other yellow ochre,
and Vandyke brown; the barges with burnt sienna, and yellow
ochre ; the darker parts with a little Vandyke brown.