Definition of "nightwandering"

And Phoebe the benign in her nightwandering chariot / Was trampling the midheaven.

1961 [29–19 BCE], Virgil, translated by Patric Dickinson, Aeneid, London: Penguin Group, page 222

Who are the agyrtai and manteis mentioned by Plato? Whether we translate them as 'nightwandering wizards' or as 'itinerant diviners and magicians', they remain shadowy figures, working at the margins of society.

1999, Valerie Flint, Witchcraft and Magic in Europe: Ancient Greece and Rome, London: University of London Press, page 103

Some man that wayfaring is stands by your spousehouse at midnight's coming, a nightwandering Israelite.

2009, Roberta Kalechofsky, Orestes in Progress, Marblehead, MA.: Micah Publications, page 123