 The verse moves fluently from line to line, and the variations
intensify the exultation in the open-air vividness and splendor of
the seascape and skyscape...the combination of accents and
alliteration in "clouds came clustering," with "came" in this context
picking up a stress, heightens the impressiveness and drama produced
by the image of the "sovereign" cloud masses "clustering" -- just the
right word in meaning and sound -- into transitory form.The metrical
regularity of the following sentence, abetted by the repetition of
sound in "conch" and "conjuration," contributes to the majestic
authority of the note sounded by Triton.The suspended moment of
turning is caught in the hovering emphasis on "green blooms turning,"
even though the long spondee adds an extra accent to the line; and
this prepares for the immense satisfactionn of "clearing
opalescence" -- the jewel-like iridescence dissolving into an
instant of transfiguring clarity.