This book examines literary representations of Sydney and its waterway in the context of Australian modernism and modernity in the interwar period. Then as now, Sydney Harbour is both an ecological wonder and ladened with economic, cultural, historical and aesthetic significance for the city by its shores. In Australia's earliest canon of urban fiction, writers including Christina Stead, Dymphna Cusack, Eleanor Dark, Kylie Tennant and M. Barnard Eldershaw explore the myth and the reality of the city 'built on water'. Mapping Sydney via its watery and littoral places, these writers trace impacts of empire, commercial capitalism, global trade and technology on the city, while drawing on estuarine logics of flow and blockage, circulation and sedimentation to innovate modes of writing temporally, geographically and aesthetically specific to Sydney's provincial modernity. Contributing to the growing field of oceanic or aqueous studies, Sydney and its Waterway and Australian Modernism shows the capacity of water and human-water relations to make both generative and disruptive contributions to urban topography and narrative topology