Mormon History, Dec 5, 1845

[Nauvoo Temple] All the canvas partitions were now up, and work on three altars was going forward. Heber C. Kimball described the main hall of the attic divided by the canvas partitions: "The Big Hall is converted into Sepret rooms for the convienience of the Holy Prieasthood, two large ones and fore small [ones] and a Hall[way] passing through betwen the Small ones, pasing from west done through the Center, & dores into each room."

[source: Brown, Lisle (compiler), Chronology of the Construction, Destruction and Reconstruction of the Nauvoo Temple]