Royal Naval Hospital, Greenwich, with fishermen and mudlarks in the foreground, viewed from a pier. Engraving by J.… https://www.rawpixel.com/image/13964908/image-person-art-skyFree Image from public domain licenseRoyal Naval Hospital, Greenwich, with ships, rowing boats, and mudlarks [], in the foreground. Engraving. https://www.rawpixel.com/image/13983172/image-paper-person-artFree Image from public domain licensePied Grallina (Crallina Australis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804-1881) Birds… https://www.rawpixel.com/image/320992/free-illustration-image-elizabeth-gould-australia-australian-magpieFree Image from public domain license