 In 1918, Krohn published "Kalevalankysymyksia" (Kalevala Questions), a two-volume hand book designed for students of Finnish Folk poetry.In "Kalevala Questions" Krohn completely reworked his position on the historicity of the "Kalevala".Krohn had previously argued that the "Kalevala" evolved from small "poetic germ cells" that merged to form a heroic epic.