This enormous collection of Austrian documents on the origins of the war was a Christmas surprise for the historian and one which he will not soon forget. Some idea of the magnitude of the collection may be obtained from the statement that these eight volumes contain over eleven thousand documents, covering a period of six years, while the great German collection of some fifty volumes contains less than fifteen thousand documents for a period of forty-four years. It must also be considered that the Austrian documents deal almost entirely with the Near Eastern situation, while the German collection is concerned with world problems in all parts of the globe. Taken by and large, this new mass of source material must be commended in the highest terms. Edited by a group of brilliant scholars and archivists, it leaves nothing to be desired in regard to form, and there is every guarantee of its complete honesty. Nothing of importance for international political relations is left out, and if there are some regrettable lacunœ, this is due to the fact that the documents were not to be found in the archives of the Austrian foreign office. It is, of course, impossible to give an idea of the contents in a few words, but it may be said in general that these documents serve to put the Austrian policy into a more favorable light, while they add immensely to our knowledge of the Serbian problem and the general evolution of the Balkan situation.