How did Frodo get his Mithril Coat back?

[Runes]

Originally Posted by Galadriel55

The Mouth of Sauron is what the guy who "negotiated" for Mordor called himself. He was the one who came out before the battle at Morannon to speak to Gandalf, Aragorn, Eomer, Imrahil, and others. He was supposed to toy around with the Captains by showing them Frodo's mithril coat and Sam's sword to make them despair. But Gandalf cracked that tale in time. The Mouth spoke like there was only one hobbit, but he had objects from two. Therefore Sauron did not, in fact, know and have everything. Perhaps at least one of the hobbits is still alive, and more importantly, still carrying the Ring.

So Gandalf takes the objects from the Mouth and in a few moments the battle starts.

Thanks, this is interesting! Is this all speculation, or was this info revealed somewhere? Sorry, I'm quite a Tolkien-novice. I've only read the Hobbit and LoTR once before the movies came out, and once again recently.