Can anyone help me find info on tengwar divination or the tresco manuscript?

I am trying to develop a divination rune set based on tengwar symbols. I have found one site that describes esoteric meanings of the tengwar symbols, but it seems to be the only one. So i would really like to find some more sources to have a more solid foundation to go on.
Also, these descriptions are said to have some from the Tresco Manuscript, which includes the 'Parma Taratirion', book of visions. Does anyone know about this manuscript? Does anyone know where it comes from? I mean really. Not that it comes from an island where they were building an abbey, translated into old english by this guy Finan in the 7th century after it was rewritten in elvish by someone researching the original author some 3000 yrs ago... Can anyone help me?