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)

BATTLE ABBEY, SUSSEX.

FIRST PROGRESSIVE STATE.
After having made the outline according to the directions given on
sketching, it will facilitate the spreading of the tint if a clean sponge, or a
flat brush dipped in water, be passed over the paper previously; the seeming
greasiness of the paper will thereby be destroyed. For the sky take
cobalt in the brush moderately full; apply it to the upper part of
the sky, observing to keep the drawing nearly upright; continue to float the
tint from left to right, and right to left, down towards the lower part of
the sky, adding a little water to the colour ; then add a little light red,
and pass this all over the paper as evenly as possible, except any object
that should be perfectly white, white drapery, &c. ; this will give a warm
and pleasing tone to the paper. If the tint should have not been spread