From Preface: In this thesis it is proposed to examine the pastoral vision, symbolized by Eden, which permeates Clare's poetry, as it is reflected in The Shepherd's Calendar, the sonnets (certain of which will be analysed in detail) and a group of lyrics. This pastoral vision, while including time and space, transcends them in such a way that Eternity becomes an important concept in Clare's pastoral poems. The final chapter of this thesis will, therefore, concentrate on this aspect of Clare's pastoral vision, not by attempting to define Clare's understanding of Eternity, but by illustrating it in four of his lyrics. Because of the lack of a full and reliable text of the complete works of John Clare and the inability of the present writer to establish for certain the chronological order of his poems, there will be no attempt in this thesis to show a development in Clare's poetry. Nor will there be an attempt to evaluate in the light of Clare's "madness" those poems known to have been written while he was in a mental asylum - a non-literary study requiring knowledge associated with the discipline of psychology; and the present writer concurs in the opinion that "it is the continuity of Clare's life and ways of thought and feeling which claims one's attention, rather than the disruptions of insanity".