Yes, Lalaith's got it right. What I meant was stuff either mentioned by a character, or maybe mentioned in another book / appendices.
another example (and it could have explained in more detail saruman's dealings with sauron) would have been Saruman's confrontation with the Nazgul at Isengard from Unfinished Tales, (and according to what version PJ saw as the most valid from that book) we could have had:
1/ Saruman 'submitting' to the Nazgul and chasing up to gandalf to save his skin, or
2/ saruman sending the nazgul away with his Voice.
Funnily enough, I believe the script writers might well have alluded to part of number 1/, as we see Saruman standing on top of Orthanc as Gandalf escapes (okay it was a different reason why Saruman was there, I admit)
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