Peter De Wint's watercolor depicts a mountain stream in the Welsh highlands with the characteristic soft luminosity and atmospheric effects for which the artist was renowned. The composition employs the artist's signature technique of layering transparent washes while selectively scratching out highlights to capture the movement of water and the play of light across the rugged landscape. De Wint's delicate pencil underdrawing provides structural foundation for this naturalistic study of the Snowdon region, demonstrating his mastery of watercolor's fluid properties to evoke the dramatic Welsh terrain.