Details of Charles Whymper's engraving 'Duck Hunting' in 1855?

Duck hunting engraving by Charles Whymper, c.1885, sepia-tone engraving. in.19 H x 25.5 W He lived 1853-1941, so I think your dating it 1855 must be wrong.

Click link below to see it, the small picture is enlarged by clicking.