Mail addressed to Nicholai Dahl and his daughter, Aagot, started stacking up at the post office in tiny Quiring, Minn., in the early spring of 1904. That was the first hint that something was amiss in the North Woods crossroads, about 15 miles northwest of Blackduck in Beltrami County.
White-haired widower Dahl, 56, was a Norwegian immigrant who had been a merchant in Crookston before staking his claim in logging country. He coaxed 24-year-old Aagot, a teacher and legal stenographer, to join him on an adjacent parcel.
A neighbor stopping to buy potatoes in early April was the last man to see either Dahl alive. A lumberjack later visiting the Dahl shack found dirty dishes on the table, prompting press reports that they'd left hastily.
When authorities contacted Dahl relatives in Crookston, they made the 100-mile trek east only to discover father and daughter "had disappeared as completely as if the earth had opened and engulfed them," the Minneapolis Journal said, "and there was no satisfactory clue that would explain the mystery."
Detectives from the Twin Cities and the famed Pinkerton agency in Chicago found a button from a woodsman's mackinaw jacket in Aagot's cabin. Relatives joined state and county authorities in offering a $1,750 reward, worth about $51,000 today.
Towering pines weren't the only things casting shadows in the forests near Blackduck. Sketchy characters with prison records frequented the area. "The criminal annals of the state record more murders in proportion to the population in the northern part of the state than in any other section," the Journal reported, under the headline: "DARK CRIME IN NORTHERN WOODS."
Nearly four months after the Dahls' disappearance, a neighbor found the father's decomposed body below the roots of a big balsam tree near his cabin. An autopsy conducted in Bemidji found a bullet wound to his head, while another report said his skull was sliced with an ax.
Three weeks later, on Aug. 17, 1904, another homesteader cutting hay found a human foot under a brush pile and unearthed a skeleton. Clothing at the scene confirmed the remains were those of Aagot Dahl, but the cause of death went undetermined.