Above, a sprig of a clove tree, a beetle, two sprigs of a cassia tree bearing leaves from which senna is extracted, a beaver and three different cavies (small rodents); below, two beetles and a mocking creeper. Etching by Heath.

Licence: Public Domain Mark

Credit: Above, a sprig of a clove tree, a beetle, two sprigs of a cassia tree bearing leaves from which senna is extracted, a beaver and three different cavies (small rodents); below, two beetles and a mocking creeper. Etching by Heath. Wellcome Collection. Source: Wellcome Collection.