In Beatrix Potter's The Tale of Mr. Jeremy Fisher, Mr. Jeremy is a frog.
Jeremy lives in a damp little house beside a pond and enjoys fishing from a lily pad. He plans to catch minnows for dinner, but his outing goes badly: a water beetle bothers him, rats disturb him, and the fish he finally catches turns out to be a large trout. The story ends with Jeremy escaping, while his friend Sir Isaac Newton becomes the trout's meal instead.
Potter's interest in the character began in a story letter she wrote to a child in September 1893 while staying near Scotland's River Tay. She sketched a frog fishing the following year, and an early version was published with verses by Clifton Bingham in 1896. Potter later bought back the drawings and developed the fuller tale.
The book was published in July 1906 by Frederick Warne. Potter was known for combining imaginative animal characters with careful observations of nature, and Jeremy's anatomy, pond plants, fishing tackle, and water insects reflect that naturalist's eye. He is sometimes mistaken for a toad or newt, but Potter's text explicitly identifies him as a frog.