Here's what we know about the Hall of Records in *The Lord of the Rings*:
* Location: It's deep within the Mines of Moria, likely within the vast chamber where the Balin's company established their stronghold.
* Contents: It holds the ancient records of the Dwarves, written on tablets and scrolls.
* Access: It's not explicitly stated how it's accessed, but it's implied to be a section within the stronghold area, not a separate room with a door.
The focus of the narrative in the books is on the journey through Moria and the events within the chamber, not the specific architecture or details of the Hall of Records itself.
It's possible that the concept of a door was added in later adaptations like the movies or video games. However, in Tolkien's original work, the Hall of Records is presented as a section within a larger space.