This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book deals with various types of frontiers and boundaries and considers these in spatial, historic and temporal frameworks. It illustrates the importance of the frontier for the creation of a sense of identity. The book describes the creation of a temporal frontier in which there is a time/space divide in the pre- and post-colonial moment. It considers the massacre of a group of Moravian missionaries in America and the ramifications this had for the congregation from which they had originated. The book examines the writings of explorer Edward John Eyre and also considers how these reflect the sexual politics of the period. Kay Schaffer shows how Eyre imposed European gender stereotypes and boundaries on to Aboriginal society.