Viner gets his name from his craft - that of a water diviner. However, this skill is not appreciated by the people amongst whom he lives, because they suffer from floods. Blamed for them, he drifts off to find a place that will welcome his knowledge. Mark's other titles include "The Ennead".
Janet Marjorie Mark (1943-2006) was a British children's author and two time winner of the Carnegie Medal. She also taught art and English in Gravesend, Kent, was part of the faculty of Education at Oxford Polytechnic in the early 1980s and was a tutor and mentor to other writers before her death from meningitis-related septicaemia.