Cyril Fox's publication The archaeology of the Cambridge region (1923) is celebrated as a milestone in the development of landscape archaeology. Its centenary invites reflection on Fox's approach to landscape and on the development of knowledge about the archaeology of the Cambridge region over the intervening years. Here, the authors compare the evidence available to Fox with the results of three decades of development-led archaeology. The latter have revealed very high numbers of sites, with dense ‘packing’ of settlements in all areas of the landscape; the transformation in knowledge of clayland areas is particularly striking. These high-density pasts have far-reaching implications for the understanding of later prehistoric and Roman-period land-use and social relations.