“Who really is the faithful and discreet slave whom his master
appointed over his domestics, to give them their food at the proper
time?”
Who is Tom Bombadil, the magical man that saves Frodo and friends. from the Barrow-Wights in Lord of the Rings? There are a lot of theories behind who he is, but the truth of his identity and place in Middle-Earth are just never revealed. Gandalf hints that he may be the oldest creature alive in Middle-Earth,but we can only speculate.
How did Elrond and the elves know that Aragorn and the hobbits were
coming? They didn’t send a messenger ahead of them to warn
anyone. If Gandalf had come back by that time, he would have tried to
help them himself. Elrond didn’t have a phone around and there was no
sign that he could sense them coming. So how did Arwen know to come,
exactly?