Take, Cradled Nursling of the Mountain, Take

Take, cradled Nursling of the mountain, take
This parting glance, no negligent adieu!
A Protean change seems wrought while I pursue
The curves, a loosely-scattered chain doth make;
Or rather thou appear'st a glittering snake,
Silent, and to the gazer's eye untrue,
Thridding with sinuous lapse the rushes, through
Dwarf willows gliding, and by ferny brake.
Starts from a dizzy steep the undaunted Rill
Robed instantly in garb of snow-white foam;
And laughing dares the Adventurer, who hath clomb
So high, a rival purpose to fulfil;
Else let the dastard backward wend, and roam,
Seeking less bold achievement, where he will!