What am I bid for this study of two black-throated divers? Bird art under the hammer at Gloucestershire auction

 

This striking hand-coloured lithograph of black-throated divers caught the eye at an auction conducted by Dominic Winter this week at the firm's salerooms in Gloucestershire. Measuring 375mm x 520mm and mounted within a glazed frame, it originally appeared in The Birds of Europe, printed by C. Hullmandel and published by John Gould (1832-37). A study of a red-throated diver from the same publication was part of the same lot. The hammer came down at £200.