Egyptian Magic in Egyptian Magic by Florence Farr.

“There is considerable difficulty about this hieroglyph; if it represents the phœnix as it has been commonly supposed to do, it would be easy to understand that it was the symbol of a soul belonging to a more complex range of being, only to be evolved through a long series of labours on the part of its human counterpart; but if it is simply a form of a common hernshaw I should take it as implying a milder and less fiery nature in the soul.” [via]