Later that year, he became part of the "Grupa Pięciu" (Group of Five), with Leopold Gottlieb, Wlastimil Hofman, Mieczysław Jakimowicz [pl] and Jan Rembowski.
[2] Three years later, he joined the Society of Polish Artists "Sztuka" and began to exhibit widely throughout Poland and Austria.
He also collaborated with members of the Zielony Balonik cabaret to create watercolors that may still be seen at the Jama Michalika café, and created illustrations for works by his friend, the writer Roman Jaworski [pl], as well as numerous vignettes and illuminated letters for books and postcards.
[1] At an exhibition in Berlin in 1906, he attracted the attention of André Gide, who arranged for a showing in 1907 at the Galerie Druet [fr] in Paris and wrote the introduction to the catalog.
[2] By this time his style had darkened due to the suffering from an incurable, congenital heart defect, which led to his death at the age of twenty-nine.