 From 1902 he was employed as a private teacher and as a clerk in the university library. In 1904 he obtained a scholarship from the Galician autonomous government and went to study in Berlin then in Louvain. In 1906 he obtained his Habilitation with a piece on “Analysis and construction of the concept of cause”. As a Privatdozent in Philosophy, he was able to give lectures at the university, becoming the first of Twardowski’s students to join him in doing so. His first course of lectures, delivered in Autumn 1906, was on the algebra of logic, as formulated by Couturat. In 1908 and 1909 he obtained a stipendium which enabled him to visit Graz, where he made acquaintance with Alexius Meinong and his school. In 1911 he was appointed Extraordinary Professor, and continued to teach in Lwów until the outbreak of war in 1914. During this time his students included Kazimierz Ajdukiewicz and Tadeusz Kotarbiński, who would later become famous philosophers in their own right. He also in 1912 got to know Stanisław Leśniewski, who had however come to Lwów after studying abroad and cannot be counted as his pupil.