The Quack or Znachor is a 1937 Polish drama film directed by Michaà  Waszyà Âski, an adaptation of the novel by Tadeusz Doà ÂÃÂga-Mostowicz published in the same year. It is followed by Profesor Wilczur (1938) and the concluding part Testament of Profesor Wilczur (1939), which was lost during World War 2.