Two goatherds sit under a tree while their flock graze on the hillside. Etching by C.G. Weisbrod after Adriaen van de Velde.

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Two goatherds sit under a tree while their flock graze on the hillside. Etching by C.G. Weisbrod after Adriaen van de Velde. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.