Saint Cassian of Imola: (top) as a schoolmaster he receives the written work of his pupils on tablets; (below) his martyrdom, he is killed by his pupils with the styluses that they used for writing on the tablets. Etching.

Licence: Public Domain Mark

Credit: Saint Cassian of Imola: (top) as a schoolmaster he receives the written work of his pupils on tablets; (below) his martyrdom, he is killed by his pupils with the styluses that they used for writing on the tablets. Etching. Wellcome Collection. Source: Wellcome Collection.