After setting the scenario of language death this study then looks into the sociolinguistic reasons which led to the decline and death of Manx in Man. There then follows a detailed look into the study of language and language use in Man, from early observations to the present day. This section includes a detailed description of phonetic and sound recordings made of Manx over the period. This leads to an in-depth study into the formal linguistic situation of Manx, tracing the development in its phonology, morphophonology, morphology, morphosyntax and syntax, idiom and lexicon, which ultimately led to its demise. As language revival is in itself a facet of language death, the study concludes with a short excursus into the various efforts at language revival and maintenance in Man, from the latter part of the 19th century to the present day. The appendices include Professor Carl Marstrander's diary of his visits to Man (1929-33) published for the first time. The diary contains percipient observations of the state of Manx in its final phase. In short, this study looks in some detail into the mechanics of language death on a once thriving and vibrant community language.