It may have been Elijah that sent the letter after the event... again sorry I am unprepared with the explanation. I will dig the source back up.
It was Elijah and it was around ten years after his being taken up in the chariot. He was transported to another place on earth. This was not the first time that Elijah was transported though...
1Ki 18:1 And it came to pass after many days, that the word of the LORD came to Elijah in the third year, saying, Go, shew thyself unto Ahab; and I will send rain upon the earth.
1Ki 18:2 And Elijah went to shew himself unto Ahab. And there was a sore famine in Samaria.
So Ahab sent Obadiah to find some water and pasture for his livestock. On the way he met Elijah...
1Ki 18:7 And as Obadiah was in the way, behold, Elijah met him: and he knew him, and fell on his face, and said, Art thou that my lord Elijah?
1Ki 18:8 And he answered him, I am: go, tell thy lord, Behold, Elijah is here.
1Ki 18:9 And he said, What have I sinned, that thou wouldest deliver thy servant into the hand of Ahab, to slay me?
1Ki 18:10 As the LORD thy God liveth, there is no nation or kingdom, whither my lord hath not sent to seek thee: and when they said, He is not there; he took an oath of the kingdom and nation, that they found thee not.
Now why in the world was Elijah so hard to find?
1Ki 18:12 And it shall come to pass, as soon as I am gone from thee,
that the Spirit of the LORD shall carry thee whither I know not; and so when I come and tell Ahab, and he cannot find thee, he shall slay me: but I thy servant fear the LORD from my youth.
Elijah was well known for being transported to other locations...
2Ki 2:16 And they said unto him, Behold now, there be with thy servants fifty strong men; let them go, we pray thee, and seek thy master:
lest peradventure the Spirit of the LORD hath taken him up, and cast him upon some mountain, or into some valley. And he said, Ye shall not send.
Actually, the NIV is not too bad here...
2Ki 2:16 "Look," they said, "we your servants have fifty able men. Let them go and look for your master.
Perhaps the Spirit of the LORD has picked him up and set him down on some mountain or in some valley." "No," Elisha replied, "do not send them."
Is Elijah the only man in the Bible known to be transported? Nope, in Acts 8 we read the story of Philip and the Ethiopian Eunuch. God guides Philip by the Holy Spirit to teach the Ethiopian then after he is baptized this amazing thing happens...
Act 8:39 And when they were come up out of the water, the Spirit of the Lord caught away Philip, that the eunuch saw him no more: and he went on his way rejoicing.
Act 8:40 But Philip was found at Azotus: and passing through he preached in all the cities, till he came to Caesarea.
Philip is transported to Azotus. Why is it a problem to believe that this also occurred with Enoch? And why is it such a problem to believe Christ?
Joh 3:13 And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.
Joh 7:34 Ye shall seek me, and shall not find me: and where I am, thither ye cannot come.
Joh 8:21 Then said Jesus again unto them, I go my way, and ye shall seek me, and shall die in your sins: whither I go, ye cannot come.
Joh 13:33 Little children, yet a little while I am with you. Ye shall seek me: and as I said unto the Jews, Whither I go, ye cannot come; so now I say to you.