The paper examines the physical layout of two rooms, one in the upper floor Joseph Smith's store, and the other in the attic of the Nauvoo Temple, for administering what is called the Mormon temple endowment. In both cases only temporary modifications were made to the interior rooms, using canvas partitions which were later removed. The text describes the appearance and arrangement of these modified interior spaces, based on contemporary historical sources, because the original buildings were completely destroyed during the 1800s.