This looks like fun and challenging, so I'll try to revive it.
First of all, read Lostgaeriel's rules from the second post.
And now, try finding two instances when this quote was uttered:

Hmm. This seems to be a challenging game.

How about 1) Frodo to Gandalf in Rivendell.
2) Pippin to Gandalf in Minas Tirith?

That is correct (that actually made three instances - the third being Merry in Houses of Healing).

All yours. :)

Okay. How about?

"Something nearly slipped."

Gorbag and Shagrat both said it, to each other.

Yep. Your turn.

By the way, I really like JRRt's interactions of Middle-earth's Rosenkrantz and Gildenstern. These orcs actually come alive as real, and rather pitiable, sentient beings, including their dreams of setting up somewhere on their own (as much as anything to get away from Sauron and the nazgul). Rather a pity there are no noted instances of orc redemption, given their origin is men and/or elves.

Find two instances where this is said, with that exact capitalization/punctuation.

Is it ok if they're from different books? I think it is so:

1. Frodo to Gandalf in 'A long-expected party'
2. Dori to Bilbo in 'Over hill and under hill'.

That's what I was looking for! Go ahead.

A hybrid of the latter: Find two instances of:

1. Gimli in Fangorn to Gandalf.
2. Farmer Maggot to Frodo, Sam, and Pippin.

That's correct, if months later. :p
Your turn :)

...yet late is better than never.
 

:p

"Third time pays for all."

Bilbo, in TH, to Thorin and Co. when it's decided he has to be the first down the secret passage.

Sam, in LOTR, to Gollum when he keeps asking Gollum to get things for the coney stew.

Yep.

I'm sorry but I cant' find a double quote that hasn't been used already. First come, first served can continue...

I read the translation of the books, so I don't know the proper wording for this in English, and I don't know if these quotes really are the same in the original, but I'll try to translate them as closely as possible:

"He never came here anymore in this life"

Hint: this is not part of someone's speech. It is said about 2 people and about the same place.

Again, I apologise if the quotes are different in the original.

I'm guessing I did translate it wrong, since no one seems to know the answer... I' really sorry about that.
The place is Lothlorien, and the book was talking about Aragorn and Frodo.

Whoever wants to go can go.

Oh, Galadriel55, sorry I wasn't around sooner. The translation was close enough, without looking I knew it had to do with Lothlorien and Aragorn at least as one character. You'll have to give us slow people more time to notice the thread. :)

I don't have a book with me, so I can't take this up right now. :)

Sorry about that! I'll give another one. I know this one for sure, but it might be a bit too obvious.

"We are the fighting Uruk-hai!"
Who said it, to whom, where, and under what circumstances?