"The space of many hours" is a curious phrase. It occurs in three contexts in the scriptures, all in temple situations.
Moses waits the space of many hours before Satan appears to tempt him.
Lehi travels the space of many hours in darkness before arriving at the tree of life.
In connection with Christ's appearance to the Nephites, Samuel prophesies "thunderings and lightnings" for the space of many hours. Curiously, the account of his coming actually reports "silence" for the space of many hours.
These are all shalem texts, visions or prophecies or experiences whose reporting is shaped by the Worship of the Shalems. Interesting.