The River Mimram rises from a spring to the north-west of Whitwell in North Hertfordshire and makes its confluence with the River Lea near Horn's Hill. The river is the subject of a Stevie Smith poem, 'The River God'. It is thought that the name is derived from a Celtic river god, although there has been little etymological research into the name. There is little doubt, however, that the river has been used through the centuries for a number of different purposes, including cress beds which have existed since Roman times. The river flows through two major Hertfordshire towns, including Hertford and Welwyn Garden City, and both have been greatly influenced by the river. Other themes touched upon include history, folklore and flora and fauna. Illustrated throughout, this is a must have for anybody who knows and loves this enchanting river.