Song of the Earth is a novel by Alexander Cordell, first published in 1969. It is the final book of Cordell's "Mortymer Trilogy". The novel is Cordell's third book in the lives of the Mortymer family, after Rape of the Fair Country and Hosts of Rebecca. It tells of the Evan family buying a canal barge on the Neath valley canal. There they meet Mari Mortymer and her adopted daughter Rhiannon. It tells of the coal industry in Resolven as well as the Brunel designed Canal system of the valley. It describes the landscape of the area (still viewable today over 150 years later) as well as the hardship suffered by the family, and growth of disease and population topography in the industrial revolution.