Stock Photo: Stag deer Cervus elaphus. . Hand-colored copperplate engraving from a drawing by Johann Ihle from Ebenezer Sibly's "Universal System of Natural History" 1794. . . The prolific Sibly published his Universal System of Natural History in 1794~1796 in five volumes covering the three natural worlds of fauna, flora and geology. The series included illustrations of mythical beasts such as the sukotyro and the mermaid, and depicted sloths sitting on the ground (instead of hanging from trees) and a domes