River and Windmill 

This pencil sketch by John Sell Cotman depicts a windmill on the bank of a river, with two boats moored at its base. The quick and gestural lines of the drawing capture the essence of a picturesque scene, likely drawn during one of the artist's sketching tours through the English countryside. Cotman was known for his expressive use of line and for his ability to convey a sense of atmosphere in his drawings, making this piece a fine example of his artistic style.