Filled with tile fragments, of all sizes, and stone. Were these tiles part of a drain lining or covering? This feature is the continuation of cut 20031 from the Northern trench of Area 20000, cutting through Wall 20018, thus post-dating the Opus Reticulatum walls. This feature was most likely used for drainage as it mirrors simple drains used in farming today. SU 20102 may be on the same alignment as similar features found in 13000, 11000, and 15000. - EBS