Published in 1895, Franz Boas's Indianische Sagen von der Nord-Pacifischen Küste Amerikas is a foundational German-language compilation of indigenous myths, legends, and oral traditions gathered from numerous tribes along the Pacific Northwest coast. The text meticulously documents the folklore of groups such as the Tlingit, Haida, and Coast Salish, focusing heavily on widespread cultural narratives like the Raven cycle and various regional creation myths. A keen insight drawn from the work is Boas's pioneering use of these folktales to prove the theory of cultural diffusion, demonstrating how specific narrative motifs spread across distinct linguistic barriers through extensive trade and intermarriage rather than developing independently. By mapping these shared story elements across vast geographic areas, Boas fundamentally challenged the era's prevailing theories of unilineal cultural evolution and established a new standard for rigorous comparative anthropology.