 |
 |
 |
| "Walking the Plank" on hippo ivory | Killer Whale Spirit on fossilized walrus ivory | "My Wife and My Mother -in-Law" on mammoth ivory, an optical illusion by W.E. Hill published in 1915 |
|
|
|
|
| "Walking the Plank" on hippo ivory | Killer Whale Spirit on fossilized walrus ivory | "My Wife and My Mother -in-Law" on mammoth ivory, an optical illusion by W.E. Hill published in 1915 |