Squirrel and forest nymphs from Three Sunsets, And Other Poems... WIth Twelve Fairy-Fancies published by Macmillan & Co.… https://www.rawpixel.com/image/572752/squirrel-and-forest-nymphsFree Image from public domain licensePerognathus from Report of an Expedition Down the Zuni and Colorado Rivers (1853) published by Lorenzo Sitgeaves. Original… https://www.rawpixel.com/image/571773/pocket-mouse-vintage-drawingFree Image from public domain license