This represents the northern wall of of room 1, room 2, and the eastern part of room 6. Within room 6, it is continued to west (up to the excavation limit) by the threshold (5491/5492). The original wall must have consisted of at least two courses of ashlar blocks: preserved is the entirety of the lowest (clearly sitting on bedrock in room 6), and six blocks of the upper (in room 2). A foundation cut (5407) and fill (5408) was identified (partially) in 2013, but was not surveyed or excavated.