He engaged in years of productive fieldwork among the Winnebago (Hocąk) Indians, primarily from 1908-1912, culminating in 1923 with the publication of his "magnum opus", "The Winnebago Tribe".
He engaged in years of productive fieldwork among the Winnebago (Hocąk) Indians, primarily from 1908-1912. Publications from this research include his doctoral dissertation, earned in 1911 and culminating in 1923 with the publication of his "magnum opus", "The Winnebago Tribe".