http://forum.square-enix.com/ffxiv/threads/39515-Want-Lore-History-Here-you-go!-%28Possible-Spoilers%29
I don't know much about this subject, but it has the mentions ghosts ect, so perhaps it is something of use?
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This might be of help? Spoilered because wall of text.I shall tell you yet again of the study of aether.
As I laboriously explained, aether is not only the source of all magicks, but also the fount of all life. Yet despite its ubiquity, it remains imperceptible to the senses of man. When a living thing dies, the aether comprising its life is released. It has been learned that when this discharge takes place, a portion of that aether remains, lingering in the physical world. No doubt you have come across aetherial crystallizations in the course of your travels. All scholars now agree that these are the physical manifestation of great concentrations of aether. I have a theory, however, that they are not the only such manifestation. Allow me to give an example even you can understand─that of ghosts, spirits, disembodied souls. Apparitions of the deceased come back to haunt and generally unnerve us? False! These are nothing more than the luminescent glow of aether in the atmosphere.
It is possible, though highly unlikely, that you are asking yourself why a portion of the aether remains. Right, well, the amount of aether that can shift between the physical and aetherial realms in any given instant is limited. I call this the aetherial threshold. Any aether present in excess of that threshold is left behind. The more violent or dramatic the loss of life, the greater the amount of inner aether released to take the form of crystals or remain imperceptibly in the atmosphere. And you surely recollect the scene I identified as the most apt to produce such violent deaths? On the field of battle! It stands to reason, therefore, that through the aetherial measurement of such sites, I will be able to reconstruct details of the wars waged upon them.
And that, is why this military historian has a deeply vested interest in the subject of aether. Despite all we do know, however, many mysteries remain. The study of aether will no doubt continue to yield fascinating and awe-inspiring discoveries for years to come─of that I am certain.
As I laboriously explained, aether is not only the source of all magicks, but also the fount of all life. Yet despite its ubiquity, it remains imperceptible to the senses of man. When a living thing dies, the aether comprising its life is released. It has been learned that when this discharge takes place, a portion of that aether remains, lingering in the physical world. No doubt you have come across aetherial crystallizations in the course of your travels. All scholars now agree that these are the physical manifestation of great concentrations of aether. I have a theory, however, that they are not the only such manifestation. Allow me to give an example even you can understand─that of ghosts, spirits, disembodied souls. Apparitions of the deceased come back to haunt and generally unnerve us? False! These are nothing more than the luminescent glow of aether in the atmosphere.
It is possible, though highly unlikely, that you are asking yourself why a portion of the aether remains. Right, well, the amount of aether that can shift between the physical and aetherial realms in any given instant is limited. I call this the aetherial threshold. Any aether present in excess of that threshold is left behind. The more violent or dramatic the loss of life, the greater the amount of inner aether released to take the form of crystals or remain imperceptibly in the atmosphere. And you surely recollect the scene I identified as the most apt to produce such violent deaths? On the field of battle! It stands to reason, therefore, that through the aetherial measurement of such sites, I will be able to reconstruct details of the wars waged upon them.
And that, is why this military historian has a deeply vested interest in the subject of aether. Despite all we do know, however, many mysteries remain. The study of aether will no doubt continue to yield fascinating and awe-inspiring discoveries for years to come─of that I am certain.
I don't know much about this subject, but it has the mentions ghosts ect, so perhaps it is something of use?