What Became of the Temple Vessels?

Here are a smattering of sources I have come across that may shed light on one of history's most enduring mysteries.

According to II Maccabees (2:4-6), the prophet Jeremiah hid the Ark of the Covenant on Mount Nebo (Deut. 32:49).

I came across an interesting reference in Eusebius' "De Iudeias" in his "Praeparatio Evangelica" where he quotes the Hellenic writer Alexander Polyhistor:
"Nabuchodonosor the king of the Babylonians, heard of the prophecies of Jeremiah...Later he also took Jerusalem and took captive Jonachem, King of the Jews. The gold found in the Temple ...he picked out and sent to Babylon. Apart from the Ark an the Tables found in it which were kept by Jeremiah".
Maccabees II is though to have been written in circa 124 BCE. Polyhistor flourished in the first half of the first century BCE. The latter may have had access to Maccabees II or perhaps both drew from an earlier source. Interesting thoughts to ponder.

Yet another possible location for the elusive Temple vessels...
חיים הורביץ הזכיר את המקום בספרו "חבת ירושלים" (1844):[6] "עין-כחל לדרום צפת, סמוך לעכברא, בדרך שהולכים מצפת לטבריא יש בקעה גדולה ועמוקה מאוד ולמטה מעין מים טובים זקוף וגבוה מאוד ולמעלה בראשו חצוב מעט בעובי ההר, כדמות שער וסתום, ונקרא עין-כחל, ועוברים דרך עליו ויש שם כמה בתים. ושם נגד מזרח יש הר ואומרים שבזה ההר נגנזו כלי בית-המקדש, והלא המה בכתובים ב'מסכת כלים' של בית-המקדש.

The Galil seems to have been the place where the exiled of Jerusalem sought to reconstitute and reorganize themselves. You have the 24 Mishmerot Kehuna scattered across various towns and villages in the Galilee, several Sanhedrins, Houses of Study and prayer and now apparently hiding places for Temple vessels as well.

Josephus mentions a Samaritan tradition that locates the Ark in a cave on Mt. Gerizim.

And then there's Ethiopia. See here

I also enjoyed this fascinating book.

Also read this paper

and this.