Mistakenly taking the Susan River instead of the Naskaupi the trip ended in tragedy. Hubbard died of exhaustion and starvation before they were to escape the interior of Labrador in October 1903. Wallace returned to New York in 1904 with Hubbard's body and obtaining the rights to use Hubbard's field notes, maps and photographs from his widow wrote Lure Of The Labrador Wild. Released in 1905 the book became an instant best seller in the United States and Canada.

Mina Hubbard was not happy with the book. She thought it an unfair depiction of her late husband. Both Dillon Wallace and Mina Hubbard resolved to return to the Labrador to complete the unfulfilled objectives of the original expedition. The press depicted the two journeys as a race which Mina Hubbard won.

Wallace wrote up his second expedition in The Long Labrador Trail, released in 1907. He then turned to writing and exploring as a new career. In 1907 he published his first tale of fiction, Ungava Bob. Subsequent journeys in other parts of North America were published as Beyond The Mexican Sierras (1910) and Saddle And Camp In The Rockies (1911). He wrote twenty-eight books many of them wilderness adventures for young boys. In 1911, Wallace moved to Beacon, New York, resumed his law practice and became heavily involved in the Scouting movement. Wallace’s last published book, The Camper's Handbook, appeared in 1936. He died in 1939.

Dillon Wallace was the author of Lure of the Labrador Wild (1905); The Long Labrador Trail (1907); Ungava Bob (1907); Beyond the Mexican Sierras (1910); Hunting with the Eskimos (1910); Saddle and Camp in the Rockies (1911); Packaging and Portaging (1912); The Wilderness Castaways (1913); The Gaunt Grey Wolf (1914); The Fur Trail Adventurers (1915); Bobby of the Labrador (1916); The Arctic Stowaways (1917); Grit A-Plenty (1918); John Adney, Ambulance Driver (1919); The Ragged Inlet Guards (1920); Troop One of the Labrador (1920); The Young Arctic Traders (1921); Grenfell of Labrador (1922); The Testing of Jim MacLean (1924); The Way to Burning Mountain (1926); Left on the Labrador (1926); With Dog and Canoe (1928); Kidnapped by Air (1929); The Lost Mine (1930); The Fur Traders of Kettle Harbour (1931); The Crew of the Pioneer (1931); Buddies of the Sea (1932); The Campers' Handbook (1936).