This edition of Thet Freske Riim and the expanded Dutch version of it known as the Tractatus Alvini was begun in 1940 and gradually completed over a period of eleven years. It is hoped that the texts presented will be found to be sufficiently "diplomatic", yet at the same time readable. A complete Glossary to the Riim is provided, and the linguistic study therefore aims merely at placing before the reader the broad features of its language, for the fulness of the Glossary will enable a scholar to obtain with ease and rapidity all the material that the text offers on any point of phonology,...