Between 1974 and 1990 the 36 excavations on 34 sites archived here were carried out by the Suffolk Archaeological Unit (subsequently Suffolk County Council Archaeological Service) under the direction of Keith Wade. The consolidation of the 1974-90 archive and the preparation of the digital archive has been funded by English Heritage (now Historic England) between 2009 and 2015. Summary narrative reports describing the chronological sequence and the range of features and activities identified for each site have been written for this project and are available from the individual site archives.