Mullers are obtainable of any artist's colourman, they are made in glass, and a convenient size is about one inch in diameter.

Were it otherwise, the estimation of a painter's merit would rise or fall with his colourman's bill and the rent of his studio.

To do this, pin a piece of tracing-cloth over the whole cartoon; this can be got from any artist's-colourman or large stationer.

My colourman takes his bill out in drawings, and I think owes me a trifle.