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 1   III|     and back~ Retreats sharp poison of corrupted frame~ Into
 2    IV|      to some becomes~ Fierce poison, as a certain snake there
 3    IV|     its coil.~ Again, fierce poison is the hellebore~ To us,
 4    IV|  start aback~ From loathsome poison, and in this wise are~ The
 5     V|     which to man~ Is violent poison. Once again, since flame~
 6     V|      would then outpour~ The poison; now, with nicer art, themselves~
 7    VI| steel,~ By cold, nor even by poison nor disease,~ Yet somewhat
 8    VI|   rises into the breezes~ To poison part of skiey space, and
 9    VI|  There, seized by the unseen poison, 'tis ensnared,~ And from
10    VI|   once down-fallen~ Into the poison's very fountains, then~
11    VI|  every unguent fears~ Fierce poison these unto the bristled