According to Wikipedia: "Hermann Heiberg ( November 17, 1840 in Schleswig , February 16, 1910 in Schleswig ) was a German writer … Heiberg wrote novels and short stories in which his varied life experiences are processed. Personen und Milieus sind aus eigener Anschauung heraus realistisch gestaltet. People and environments are more realistic from my own experience out. Die deutschen Naturalisten betrachteten ihn als Vorbild. Theodor Fontane lobte Heimanns Apotheker Heinrich als "deutschen Musterroman". The German naturalist regarded him as a model. Theodor Fontane pharmacist Heinrich Heimann praised as the "German model Roman".
