The landmark, unveiled in 1990 and situated near Leeds Corn Exchange, depicts the goddess Cornucopia.
Robert Louis Stevenson wrote Strange Case of Dr Jekyll and Mr Hyde while living in Dorset.
Mud maiden has been created with funding to encourage more physical activity at the woodland site.
Mark Titchner's artwork draws upon his research into a pioneer of the circulation of blood.
The 150 charity sculptures will be in Sheffield, Doncaster, Rotherham and Barnsley.
Jersey's government has now invited the artist to work together, having removed their work.
Banksy has put up a statue in Waterloo Place.
Six of the first 18 sculptures by local artists are being put up in Hornsea.
The plans will see an 8ft (2.4m) sculpture of Godred Crovan, known as King Orry, at Tynwald Hill.
