This book has analysed imperial identities, networks and diasporas among British engineers with African connections. It has identified a number of functions served by the engineers that made them important agents in the British empire and it has demonstrated that imperial factors exerted profound influences on the British engineering profession in the period 1875–1914. In the course of the book the imperial dimension has been fleshed out in the reading cultures that developed around the engineering profession and notably in the professional journals that tied groups of engineers in Britain and in the colonies together on multiple levels. The study has, moreover, demonstrated that imperial influences were decisive factors in moulding locational patterns among British-based segments of an engineering profession whose leading members were congregated in Westminster, the heart of imperial London. It has also been analysed how the powerful metropolitan engineering networks – the social engines in a profession in which patronage structures and strong ties of obligation and trust remained crucial – were adapted gradually to a situation where assignments and revenues increasingly were generated from imperial and colonial projects. Imperial influences – metropolitan and colonial in origin – also shaped the ICE and the role that the most important of the professions' accredited institutions was envisioned to fulfil.