A page from a sketchbook with an annotated graphite pencil sketch on the front and a watercolour image on the back. The front depicts a horizon line with some small sailing vessels just below. The image largely depicts the sky with clouds. The lower left half of the page has lots of annotations. The back depicts a graphite pencil sketch of a large wave that is roughly centred and stretches back to the horizon line. The details of the wave are picked out in grey and blue watercolour paint. There is a faint sketch of a cloud in the sky.