Streszczenie
The paper is based on the analysis of selected fragments of personal correspondence between Józef Piłsudski and Aleksandra Szczerbińska. We focus on complicated relations holding between them in the time of the First World War. Both for Piłsudski and Szczerbińska it was not only the time of important political and military events but also of the development of their relationship and of the birth of their first daughter Wanda.