Whittock, Nathaniel: The Art Of Drawing And Colouring From Nature, Flowers, Fruit, And Shells: To Which Is Added, Correct Directions For Preparing The Most Brilliant Colours For Painting On Velvet, With The Mode Of Using Them, Also The New Method Of Oriental Tinting ; With Plain And Coloured Drawings (London, 1829)

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any perceptible veins. The pattern must be drawn os the largest and
lightest mass ot colour; another pattern sor the middle tint, and a
third for the darkest shade. The colours must be sostened into each
other, by working each from the dark side of the pattern, towards the
light.
The plums in Lesson XI. are excellent subjects for this style os
painting. The student having done one subject will understand the
whole art at once ; and prosiciency can only be obtained by practice,
and the exercise of taste and judgment for foliage : the leaves given in
Lesson IV. will be the best example for practice. In cutting the
patterns, which is the only difficulty in this style os painting, it will be
advisable to do half the leaf at a time, and brush srom the centre os
the leaf to the notches, as the strongest colour is generally in the
centre, and it gives the division of the leaf strongly. Where light veins
are required, it will take some time to cut out the leas with the pen-
knife, so that the veins may be preserved in the tracing paper; but it
must be observed, that the pattern once made, will give a hundred
leaves, which can be applied to as many disserent drawings, without
further trouble. The dark veins are best put in with a camel-hair
pencil, after the light and shade are given.
If minute instructions for preparing patterns, and the mode os
colouring every subject in this style of painting were given, it would
greatly extend the work, without materially benesiting the student,
especially such as have laid the only proper soundation sor any