First published in 1935, this volume by Kenneth Jackson examines the different types of nature poetry that were produced in Ireland and Wales up to the twelfth and thirteenth centuries. The work is divided into two parts. The first part contains the texts of the Irish and Welsh poems, translated into English and edited with notes. The second part offers a critical analysis of the poems, drawing comparison to the literature of other cultures such as Anglo-Saxon, and considering what sort of people composed the poems and what their purpose was. This volume, which has long been out of print, will be welcomed by medievalists as well as enthusiasts of Irish and Welsh poetry.