Philip Schaff,
Nicene and Post-Nicene Fathers…
(1885)
“ It is hardly profitable to discuss the possibilities. The lack of contemporary evidence to details and the description of Lactantius as a dream is fatal to any idea of a miraculous image with inscriptions clearly seen by all. Some cross-like arrangement of the clouds, or a “parahelion,” or some sort of a suggestion of a cross, may have been seen by all, but evidently there was no definite, vivid, clear perception, or it would have been in the mouths of all and certainly recorded, or at least it would not have been recorded as something else by Lactantius. ”
