Above, detail of the handle of a black-figured Greek vase; middle, stylised swan and cygnet; below, stylised swan. Watercolour by A. Dahlsteen, 176- (?).

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Above, detail of the handle of a black-figured Greek vase; middle, stylised swan and cygnet; below, stylised swan. Watercolour by A. Dahlsteen, 176- (?). Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.