) in a circle, symbolically representing the world of the dead, which was in the oldest times associated with the places where the sun and stars reappeared after having been invisible.
Gardiner, Alan (1957) Egyptian Grammar: Being an Introduction to the Study of Hieroglyphs, third edition, Oxford: Griffith Institute, âISBN, page 487
Betrò, Maria Carmela (1995) Geroglifici: 580 Segni per Capire l'Antico Egitto, Milan: Arnoldo Mondadori Editore S.p.A., âISBN