Elephants in Art

I recently saw a medieval picture depicting Alexander the Great and some elephants so I thought I would find as many as I could on the same subject. The first and third look as if the artist was told/read about what elephants look like, whereas the middle one, which, unlike the other two european pictures, is middle eastern and based on the much more accurate elephant the artist must have actually seen an elephant. Elephants being presented to Alexander the Great^ I can't remember the story that is supposed to be behind this picture^

Elephants going to war with fortresses on their backs^