Having completed legal studies at the Jagiellonian University, he took a doctor’s degree at that institution under the supervision of Professor Stanisław Estreicher in 1924; then he resolved to continue his education in Paris, where he was connected with the “Revue Historique de Droit Française et Ètranger” (until 1927). In 1927 he qualified himself assistant professor at the Jagiellonian University on the basis of his treatise O podniesieniu na tarczy u dawnych Germanów. In the same year he began to lecture in legal history of Western Europe at the PoznańUniversity. In 1930-1939 he was deputy professor at the Faculty of Law of that institution and, at the same time, the lecturer of ‘public courses’ organized in the Greater Poland by Professor Zygmunt Wojciechowski. Some of Jedlicki’s important publications date back to that period, including Stosunek prawny Polski do Cesarstwa (1939). During the Second World War he initially stayed in Vilnius, where he lectured on canon law for a short space. Already in 1939, however, he made his way to Great Britain, and then to France. Once there, in April 1940 he volunteered to the Polish Army and was assigned to General Władysław Sikorski’s staff. After the defeat of France in the war against Germany, he again found himself in Great Britain. As a specialist in Polish-German relations, he was employed as an expert in the émigré Ministry of Congress Work in 1941. In 1943 he published his scientific study 1000 Years of German Aggressions. He was also busy organizing the Polish Faculty of Law at the University of Oxford, where he lectured on legal history of Western Europe. In the spring of 1946 Jedlicki returned to Kraków to succeed Professor Estreicher as the head of the Department of General History of the State and Law at the Jagiellonian University and as the lecturer at the Kraków School of Political Science. In 1946-1949 he was also a visiting professor of the University of Warsaw. In 1949 Jedlicki was transferred to the Faculty of Law of the PoznańUniversity where he collaborated again with Professor Z. Wojciechowski, at whose suggestion he undertook to translate Thietmar’s Chronicle from Latin into Polish. Besides, after the Second World War the following studies by Jedlicki were published: Zagadnienia ustrojowo- polityczne Wielkiej Brytanii i Dominiów (1947), and Wybór tekstów źródłowych do powszechnej historii państwa i prawa (already posthumously, in 1955).