Under Mauleon she learnt how to draw in black and red chalk.

He sketched this drawing onto a piece of paper with black chalk and ink in Paris, 1887.

"The black and white chalk over the red gives it an electric feel," he says, almost tongue-tied with excitement.

He could even rhapsodise about a lump of black chalk.

Her frizzy hair is a tangle of black and red chalk, a halo.

This little self-portrait, black chalk on ivory paper 120mm x 99mm, was drawn around 1562-1570.

The portrait is drawn in black and red chalk with white heightening on brown wash paper.

But his innovative layering of red and black chalk, eventually to be augmented by white, is already in place.

Grant also executed drawings in red and black chalk, mostly illustrations to poetry.

His drawings are usually executed in black and red chalk, sometimes with the addition of blue or yellow gouache.