Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
The skull and portraits of Henry Stewart, Lord Darnley, and their bearing on the tragedy of Mary, Queen of Scots / by Karl Pearson, F.R.S.; with frontispiece, forty-five plates, four figures in the text and six tissues of cranial contours. Public Domain Mark. Source: Wellcome Collection.