Nameless and lowly issuing from the rock;
While in the clear deep bed by nature scooped
As in a cradle noiseless, calm, it sleeps,
Flowers crown its bank with perfume, and serene
The blue of heaven descends upon its breast:—
But from the hill’s close arms escaped, when spread
Its waves o’er neighbouring plains—with river slime
How swell its billows, and with bloated bulk
Grow pale and putrid! From its shores recede
The wonted shade, and but the naked rock