Wall possibly associated with later phase of use (second phase before fire in 1st c AD?) built on top of 17018 and abutting 20019, built on top of 20067 (= 20017). Final course of squarish stones found in opus reticulatum walls visible underneath course of river stones. Collapse of large river stones found in 17000 associated with wall 17002 - our first clear collapse of opus reticulatum superstructure - is very similar in technique to 20042. Could this be in phase with workshops?
SU 20042: view toward N
SU 20042: view toward E
SU 20042: view toward SE
Detail of corner where SU 20067 (under SU 20019) meets SU 20042 (over SU 20018 = 17018) and SU 20058. View toward the W