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

Portinscale Bridge near Keswick

Drawn & Engraved by W Westall ARA

Published July 1 1819 London Hurst Robinson & Co.

measures 260mm x 175mm + 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