BBbevan
This won't give you the answers you ask but :
The title of the series, His Dark Materials, comes from seventeenth century poet John Milton's Paradise Lost, Book 2:
Into this wilde Abyss,
The Womb of nature and perhaps her Grave,
Of neither Sea, nor Shore, nor Air, nor Fire,
But all these in their pregnant causes mixt
Confus'dly, and which thus must ever fight,
Unless th' Almighty Maker them ordain
His dark materials to create more Worlds,
Into this wilde Abyss the warie fiend
Stood on the brink of Hell and look'd a while,
Pondering his Voyage; for no narrow frith
He had to cross.
— Book 2, lines 910–920