由馬兒負責拖拉的木材重擔，明尼蘇達州，20世紀早期

出處: Halvorson, Lewis H., photographer. "Banner load, Blackduck, Minnesota : biggest load of logs ever hauled / by Lewis H. Halvorson." 1909. The Northern Great Plains, 1880-1920: Photographs from the Fred Hultstrand and F.A. Pazandak Photograph Collections, Fred Hultstrand History in Pictures Collection, NDIRS-NDSU, Fargo.