"Loneliness clarifies. Here silence stands like heat. Here leaves unnoticed thicken, Hidden weeds flower, neglected waters quicken, Luminously-peopled air ascends; And past the poppies bluish neutral distance Ends the land suddenly beyond a beach of shapes and shingle. Here is unfenced existence. Facing the sun, untalkative, out of reach.”

Which of the following poets in which of his/her works has used the above lines?