Although Kilivila - the Austronesian language of the Trobriand Islanders of Papua New Guinea - is not an endangered language, there are two metalinguistically labeled varieties or registers of this language which are moribund by now: These varieties are the "biga megwa" - the language of magic and the "biga baloma" - the language of the spirits of the dead. The latter language variety is an archaic variety of Kilivila. It is constituted by specific songs - the so-called "wosi milamala" - the harvest festivals songs which are not only sung during these festivals but also after the death of a Trobriander during the first mourning ceremonies. The majority of these songs describe in a highly poetic way the carefree ‘life’ of the spirits of the dead in their ‘underworld paradise’ on Tuma which is one of the Trobriand Island. The songs codify the most important aspects of the Trobriand Islanders' eschatological belief system which explains what happens when someone dies. Although the songs are still sung by the Trobriand Islanders because of their ritual impact, most of the singers no longer understand the lyrics they have learned by heart. This volume not only documents 20 song cycles and thus contributes to preserve the knowledge of the traditional belief system of the Trobriand Islanders, it also presents an anthropological linguistic analysis of their eschatological content and provides a critical review of Bronislaw Malinowski's ethnography on the topic. The interested reader of this book also has the opportunity to access the internet and listen to most of the original data presented in the volume.