The publication includes 19 documents which contain valuable information about the Polish cause during the WWI and the history of Polish Legions. A document that stands out in this collection is a matter-of-fact article prepared by Stanislaw Downarowicz, who was a Polish member of Austrian Parliament. This important document was passed on to the Austrian-Hungarian Minister of Foreign Affairs Stefan Burian, and contains a matter-of-fact critique of Austria-Hungary attitude to the Polish cause and the conduct of Austrian-Hungarian occupational authorities in the part of the Kingdom of Poland territory the Russian troops retreated from. Moreover, the publication includes several documents reflecting political situation in the territory of the Kingdom of Poland occupied by the armies of Germany and Austria-Hungary. These documents do not only contain characteristics of general political situation, but they were also thought as an attempt to justify the conduct of Austrian-Hungarian authorities during the Kingdom of Poland occupation. Besides, the publication includes crucial information about details of Józef Pilsudski's banishment from Warsaw in August 1915. On the other hand, an important letter of Austrian-Hungarian General Military Headquarters (Armee Oberkommando- AOK) mentions the idea of Polish Legions' liquidation in 1915 if Poles, particularly Józef Pilsudski, put across clear political postulates of sovereign nature.