but certainly I could by no means believe that God's holy angels could at that time have so fallen, nor can I think that it is of them the Apostle Peter said, For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment. 2 Peter 2:4 I think he rather speaks of these who first apostatized from God, along with their chief the devil, who enviously deceived the first man under the form of a serpent.
Here's another few questions i'd like to ask St Augustine:
1. Satan and those angels who rebelled against God and who were defeated by St Michael are in hell and are ALREADY JUDGED, are they not? Judgement day means nothing for them, other than their battle for earth is over.
2. In theory, those fallen angels who fell into lust (not a direct rebellion against God, like lucifer's clan) would then be chained in hell/darkness until the judgement day, because they fell AFTER earth was created; they fell AFTER time/temporal calculations existed. Therefore, judgement day would matter for them, and also it would matter for their offspring, the nephilim.
As an aside...I believe Enoch says that the fallen angels were chained in a pit, but the Nephilim/Giants, when they died, since they were part angel/part man, still have their angelic souls and part of their punishment is to "roam the earth" until the end of time. They are always searching for a body; searching for temporal vessels because they feel incomplete.
I always wondered the difference between demons in hell and "evil spirits"/ghosts. Surely there is a difference. And I believe the nephilim answer the question and provide all kinds of answers to the existence of ghosts, hauntings, seances, witchcraft, etc. It's why the evil spirits try to possess animals (the pigs in Scripture who jumped off the cliff after Christ released the man from possession) and also try to possess people. I think it's these spirits who possess musicians/actors/elites and may be the answer as to why some of these people look "off" or look like clones. They've made themselves a vessel of the demonic. But that's a whole other topic.