This month I am taking part in a month of drawing, posting images every day. I found this spiny horse chestnut case this afternoon, and I thought it would be wonderful subject to sketch. The dark interior really reminded me of the nearby Bwlch cauldron, which I've also been trying to sketch recently. I love the contrast between the hollow inside - with its fleshy base - and the hard, spiny outer shell. I have drawn this using sepia and black ink, with white Conte pencil.