Composed by the side of Grasmere lake. The mountains that enclose the vale, especially towards Easdale, are most favourable to the reverberation of sound. There is a passage in the "Excursion," towards the close of the fourth book, where the voice of the raven in flight is traced through the modifications it undergoes, as I have often heard it in that vale and others of this district.
                                    "Often, at the hour
                 When issue forth the first pale stars, is heard,
                 Within the circuit of this fabric huge,
                 One voice--the solitary raven."