The Gray Havens.
"Return!" exclaimed Frodo. "Is that even possible?"
"There is one way" grumbled Elrond.
Gandalf looked at Elrond "I thought that the circle was broken."
"It was" said Elrond "Until the Three were returned to the Havens. That made the circle whole again."
"Please explain why we are being given the option to return in the first place" said a frail old man sitting at the end of the table.
Galadriel looked to Elrond and said "When Frodo destroyed the ring he did indeed destroy the power of Saurian but thorough our foresight we have seen that there is enough of Saurian to bring him back. I don't think that even Saurian knew that when he gave the nine their rings that he was ensuring that even in the impossibility that the ring was destroyed he would survive through his Nazgul."
"So," said Bilbo "we need to return to middle earth to warn the people and to save the day, again."
"The eldest of Hobbits will accompany them of course" said Galadriel.
"WHAT," cried Bilbo "how is that possible I'm over one-hundred-fifty years old. How do you expect me to go climbing mountains and sneaking around dark places. Not to mention the fighting, I'll admit I never did much fighting in my first adventure or in any that followed. So again I ask you how?
Galadriel smiled and responded "You will just have to leave a few years of yourself here." After a few moments of silence she explained. "We would keep Bilbo from say years fifty-one to present and fifty year old Bilbo would return to Middle-Earth.
"Incredible" said Gandalf "I didn't know that the power of the elves extended that far."
"It doesn't" Elrond responded gravely. That we leave to the deciding of the silver circle."
The Garden of the Silver Circle.
"The Silver Circle is a group of twelve beings that are not entirely in Middle-Earth or any other world." Gandalf explained as they walked into a garden that neither Bilbo nor Frodo had ever been allowed to enter. "The bearers of the Three are the only ones who can communicate with them. They are each in control of a certain element of life and you shall address them as such. They are: Of Storm, Of Sea, Of Death, Of Motherhood, Of Love, Of Wisdom, Of Messages, Of Fire, Of Music, Of Hunting, Of War and Of Wine." This was all a little overwhelming for the Hobbits as they walked before twelve thrones. For some reason Frodo could immediately tell which being was which. He then felt a familiar feeling, as though he heard a voice without his ears, except it was echoing as though it was far away.
"No absolutely not" said Of Storm.
"They would be back within the year" Galadriel said. "If they don't go then Saurian will rise again and that can not happen."
Along silence ensued, or were the Silver Circle conversing in a tong that the onlookers couldn't understand finally after what seemed like hours Of Sea said. "We have decided to open the portal to for the hobbits Mithrandir and one Elf guard to go through. We will also take 100 years of the eldest of hobbits age. Finally, we will be sending our six finest warriors, to make sure that you all return to the Gray Havens." As he said this a purple whirlpool appeared next to the small group of people.
"One more thing" said Of War. "We are holding Galadriel to her promise of you all being back within the year. You all will find upon your return to middle earth that there are all wearing black marble rings each of these rings has a lock on the bottom that will be unlocked once you return. But if you stay even one minute after the New Year a small but never the less lethal amount of poison will be injected into you. It is also how we know to open the portal to bring you back" and with that they were all pushed through the portal.