Altough interpretation is difficult given the small size, fragmentary nature, and marginal position of the stone, based upon its thikness and the way it is worked, this seems to be part of a broken slab, possibly originally belonging to the floor of room 6. In what has been excavated thus far of room 6, the floor has otherwise been removed, altough it may be preserved in situ under the excavation limits to the south and west. This grey tufo of slab floor would be analogous to floor 5410 and 5522/5567.