45. M. Freret (Memoires de l'Academie des Inscriptions, tom.
iv. p. 411-437) explains, by physical causes, many of the
prodigies of antiquity; and Fabricius, who is abused by both
parties vainly tries to introduce the celestial cross of
Constantine among the solar halos. Bibliothec. Graec. tom.
vi. p. 8-29.