Tokenhouse Yard in the City of London lies in the upper reaches of the valley of the Walbrook. The Walbrook was undoubtedly a powerful and important topographical feature of the Roman city, rising to the north and coursing through the centre of the settlement cleaving it into two low hills, Cornhill and Ludgate Hill, before discharging into the Thames to the south. This area witnessed the build up of almost 4m of stratified deposits in the years between c. AD 43 and 400. The results of excavation presented in this volume tell the story of the struggle to live alongside the river, attempts to control its course and alleviate flooding. Waterlogged conditions resulted in outstanding preservation of organic remains and artefacts.