XXIII.
While thus they spake, the angelic caravan, Arriving like a rush of mighty wind, Cleaving the fields of space, as doth the swan Some silver stream (say Ganges, Nile, or Inde, Or Thames, or Tweed), and midst them an old man With an old soul, and both extremely blind, Halted before the gate, and, in his shroud, Seated their fellow-traveller on a cloud.[512]