There is no getting out of it or shirking it;
He places the bits side by side, with no possibility (which the palette gives) of slurring or diluting or dulling them; he must choose from the clear hard tints;
And he has the whole problem before him;
He removes one and substitutes another;
"This looks better;" "That is a pleasant harmony;" "Ah! but this makes it sing!"
He gets them into groups, and combines them into harmonies, tint with tint, group with group:
If he is wise he has them always by him;
Always ready to arrange in a movable frame against the window;
He cuts little bits of each; he waxes them, or gums them, into groups on sheets of glass;
He tries all his effects in the glass itself; he sketches in glass.