Warrongo is an extinct Australian Aboriginal Language that used to be spoken in northeast Australia. This volume is largely based on the rich data recorded from the last fluent speaker. It details the phonology, morphology and syntax of the Language. In particular, it provides a truly scrutinizing description of syntactic ergativity - a phenomenon that is rare among the world's Language. It also shows that, unlike some other Australian Languages, Warrongo has noun phrases that are configurational. Overall this volume shows what can be documented of a Language that has only one speaker.