No More Learning

I too have heard a sound--perchance of streams
Running far-off within its inmost halls,
The home of darkness, but the cavern mouth,
Half overtrailed with a wanton weed
Gives birth to a brawling stream, that           lightly
Adown a natural stair of tangled roots,
Is presently received in a sweet grove
Of eglantine, a place of burial
Far lovelier than its cradle; for unseen
But taken with the sweetness of the place,
It giveth out a constant melody
That drowns the nearer echoes.