To embody orally transmitted traditions abd teachings relating to texts collected from Late Lama Kazi Dawasamdup and to place on records not only a 'Catena' (of carefully made translations of text)which are still a subject of inquiring for occidental countries, all these have been successfully attempted by this book. The seven principal texts which belong to a date long way beyond the time to which the actual manuscripts and block prints can be referred by this book. General introduction, a brief account of Buddhism before each treatise helps common reader which is in contrast to the European conception of religion, philosophy and science.