Journal of a second expedition into the interior of Africa, from the Bight of Berin to Soccatoo / by the late Commander… https://www.rawpixel.com/image/14005581/image-face-person-artFree Image from public domain licenseDiesel tree (Copaifera officinalis) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John… https://www.rawpixel.com/image/327087/free-illustration-image-botanical-flower-treeFree Image from public domain license