Monochrome photographic postcard from the Zoological Society of London series, showing a young lion cub perched alone on a mossy rock inside its barred enclosure at Regent's Park. The cub faces the camera with alert, wide-set eyes and large paws. The photograph is by D. Seth-Smith, F.Z.S.

• Caption: "No. 20. All On His Own. Lion Cub"
• Photographer: D. Seth-Smith, F.Z.S.
• Publisher: Zoological Society of London, Regent's Park, N.W.
• Status: Unposted