Above, a musk rat, a lemming, three birds and a weasel (mustela); below, three insects, a stoat, a bird, a sprig and fruits of myrtle, and an ant eater on a tree trunk. Engraving by Heath.

Licence: Public Domain Mark

Credit: Above, a musk rat, a lemming, three birds and a weasel (mustela); below, three insects, a stoat, a bird, a sprig and fruits of myrtle, and an ant eater on a tree trunk. Engraving by Heath. Wellcome Collection. Source: Wellcome Collection.