Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3294471/free-photo-image-animal-animals-images-pictures-best-stoneFree Image from public domain licenseMountain arnica (Arnica montana) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John… https://www.rawpixel.com/image/327117/free-illustration-image-arnica-tobacco-vintage-arnica-montanaFree Image from public domain licenseJackal from The Land of the Lion; or, Adventures Among the Wild Animals of Africa (1876). Original from the British Library.… https://www.rawpixel.com/image/573177/jackal-animal-drawingFree Image from public domain licenseJackal from The Land of the Lion; or, Adventures Among the Wild Animals of Africa (1876). Original from the British Library.… https://www.rawpixel.com/image/572699/jackal-animal-drawingFree Image from public domain licenseWolf Fish (Anarihchas Lupus) from Ichtylogie, ou Histoire naturelle: génerale et particuliére des poissons… https://www.rawpixel.com/image/938565/anarihchas-lupusFree Image from public domain license