You are looking at an original early 19th century uncoloured aquatint - as described 

Keswick Lake [Derwentwater] from Saddleback

Drawn & Engraved by W Westall ARA

Published April 1 1820 London Hurst Robinson & Co

measures 260mm x 170mm + margins

Exceptionally scarce uncoloured aquatint by W Westall - this is the only example we have had to offer for sale in more than 50 years

Thank you for looking - scarce thus

any questions please ask before bidding