‘hippopotamus’ historical pictures (exact matches)

Nature Wonderland: A Happy Hippo
Nature Wonderland: A Happy Hippo
Animals laughing at a couple visiting the zoo
Animals laughing at a couple visiting the zoo
Dr Livingstone's Missionary Travels and Researches in South Africa
Dr Livingstone's Missionary Travels and Researches in South Africa
The adventure with a hippopotamus
The adventure with a hippopotamus