James Guidney

James Guidney or Jemmy the Rock Man (born 1779 or 1782; died 1866) was a British soldier and later street pedlar in Birmingham, England.

Guidney was born in Norwich in 1779 or 1782.

Several artists painted Guidney; a watercolour portrait by John Church Dempsey is in the Tasmanian Museum and Art Gallery and three in oil (one by William Thomas Roden), and a watercolour, are in Birmingham Museum and Art Gallery, which also holds a silver plated relief, and the tin from which he sold medicated toffee, "good for cough or cold".

His short biography, Some particulars of the life and adventures of James Guidney, a well known character in Birmingham. Written from his own account of himself., was published anonymously in Birmingham and ran to at least four editions, with revisions. It is considered autobiographical, and has many demonstrably-incorrect dates. Among the incidents described are the capture of a purported mermaid, and a lamb that Guidney claimed had assumed human form and instructed him to grow a beard.

Guidney died on 28 September 1866 and is buried in Birmingham's Witton Cemetery.