A city must stand on stable ground for it to be a place of residence, sociability and peace. If so, the following is an exploration of how a city came to be in a wetland, with marshy ground, with an overflowing river, with stormy seas and with lowland liable to flooding. A wetland, the key ecology in what follows, was not easily urbanized. Indeed, in the late modern moment, taken in what follows simply as a shorthand to refer to the later nineteenth and early twentieth centuries, earth was dug, water was channelled, a river estuary was changed, reefs were affected, harbours were built and sea flow appeared to change. Yet, the manipulation of terrain of various kinds did not create a space which was a smooth site of connection and meeting for colonists and colonized. Rather, nature obstructed these fluid experiments of engineering in various ways. Simultaneously, the people who congregated at these sites forged new ways of considering their status in the ‘new imperial’ colony. The colonial reorganization of nature ran parallel with colonial attempts at arranging people; yet, both nature and people did not yield automatically to the hand of this new regime of modelling and segmenting environments in and around the sea and land.