Hast Thou Seen, With Flash Incessant

[Where the second quarry now is, as you pass from Rydal to Grasmere, there was formerly a length of smooth rock that sloped towards the road on the right hand. I used to call it Tadpole Slope, from having frequently observed there the water-bubbles gliding under the ice, exactly in the shape of that creature.--I. F.]

Hast thou seen, with flash incessant, Bubbles gliding under ice, Bodied forth and evanescent, No one knows by what device?

Such are thoughts!--a wind-swept meadow Mimicking a troubled sea, Such is life; and death a shadow From the rock eternity!