The Wye draws little further on this watershed, till after 20 miles of wandering in the wilderness, growing gradually less savage, and playing all the tunes and chords known to little trout streams amid the pastures of Llangurig, it meets the Marteg and the Elan, near Rhayader, and begins to take itself seriously. This indeed is the real beginning of the Wye, for most of those who know its upper reaches. For here it achieves maturity and enters the world; and a beautiful world too, of waving woodlands and overhanging mountains, but one which many pass their lives in and others visit, and traversed by a good valley road and a railway. The Elan but a few short years ago came from the west out of this Ellineth wilderness, bringing with it the waters of the Claerwen through a deep vale, unforgettable by those who knew it for the exquisite combination of luxuriant low ground and the fine grouping of its overhanging mountain walls. If Cwm Elan was retired from the world in the ordinary sense, it is a familiar enough name to all students of Shelley, whose cousins then owned it, and who himself settled here for a time with his young, hapless, and ill-suited wife. The hills and crags, however, that inspired the poet's earliest muse, Those jagged peaks that frown sublime, Mocking the blunted scythe of time, look down now upon far different scenes, though perhaps in their way not less lovely ones. Deep waters now glimmer from hill to hill where the Elan ran but yesterday through wood and pasture to join the Wye; and yet deeper into the hills, where the Claerwen leaped from the wild into this now submerged Arcadia, is another lake, thus laying both the main stem of the valley and its forks under the same vast sheet of water. If this chain of lakes is the work of the Birmingham Corporation and not of Nature, they are of this last at any rate a good imitation, and reflect upon their bosoms no shadows less harmonious than those of the everlasting hills.