This paper collects some of the references to the repository of Nephite records in the Hill Cumorah in New York. You can download it at this link:
The significance of the Hill Cumorah in the restoration of the gospel goes beyond its identification as the ancient repository of the metal plates known as the Book of Mormon.
In the second half of the 19th century, a teaching about a cave in the hill began surfacing in the writings of several leaders of the Church of Jesus Christ of Latter-day Saints. In their view, the hill was not only the place where Joseph Smith received the plates but also their final repository, along with other sacred treasures, after the translation was finished.
This article cites ten different accounts, all secondhand, that refer to this cave and what was found there.
The author includes a comparison of the accounts that discusses additional records in the cave, God’s dominion over Earth’s treasure, miraculous dealings of God, and the significance of the presence of the sword of Laban.