This SU appears to be a cut for a doorpost located on the western side of the doorway between rooms I-17 and I-18. Upon end-of-season cleaning of the mosaics and floor prep in rooms I-18 and I-17, it was discovered that there is a nearly identical cut (not recorded this season due to time) that mirrors this western SU on the eastern side of a possible threshold (also not documented this season because another SU covers it and we did not have time to excavate it in 2018). Further exploration is needed next year to fully understand whether these cuts and threshold located below the level of the mosaics in rooms I-17 and I-18 may relate to an earlier occupation period.