1975 Location of Jenne-jeno (ancient Jenne) from verbal communication with inhabitants of modern Jenne.

1977 Surface survey of Jenne-jeno establishing excavations in residential and burial areas. Excavation reveals six meters of deposits dating occupation from 300-200 BC to AD 1400 and establishing a ceramics sequence of four phases.
Preliminary survey of the hinterland, establishing a 1083 km2 survey region. A randomized probability survey of 20% of discrete settlement mounds visible by aerial photography demonstrated that all such mounds contained archaeological materials for a total of 404 permanent settlements in the region. Patterns of abandonment were established.

1981 Further excavation of Jenne-jeno was undertaken, along with excavation at the nearby sites of Hambarketolo and Kaniana. The latter sites demonstrated the applicability of Jenne-jeno sequences to date hinterland sites.
Ceramics and other surface remains were collected from 50% of the hinterland sites, randomly determined, in a 4 km radius of Jenne-jeno. These clustered sites might have been specialist communities to Jenne-jeno.

1983-1984 To establish a comparative perspective, comparable survey at Timbuktu was undertaken. Timbuktu was the sister city to Jenne in historical times. Survey demonstrated the presence from c. AD 500-1500 of many large sites along the narrow Niger floodplain and along the wadis perpendicular to the river.

1986-1987 To gather more data about clustered cities in the Middle Niger, excavations at satellite sites to Dia were undertaken. A similar survey of nearby sites showed an analogous pattern of clustering

1994 Surface surveys and coring at Jenne, Jenne-jeno, and satellite mounds were undertaken to establish differentiation (by function) at these sites. Occupation at late Jenne-jeno and early Jenne overlap by some centuries.