Jack E. Haynes was born to photographer F. Jay Haynes and Lily Snyder Haynes at Fargo, N.D., September 27, 1884, months after his father had been granted his first concession license to operate a photography studio in Yellowstone National Park. The last of the Haynes' three children, JEH nonetheless became his father's heir in the family business. Sometime in the 1910s Jack married his first wife, Margaret Larkin. Little is known about the marriage other than the date of divorce in late March, 1930. A week later, 1930 Apr 10, Jack married Isabel Nauerth, a former employee of the Yellowstone Park Hotel Company and for three years the manager of Roosevelt Lodge. In 1931 the couple had their only child, Lida Marie Haynes. Lida and three friends were killed in an automobile accident in 1952 south of Livingston, Mont. Jack served as executor to for the estates of his father in 1921, mother in 1928, and brother George. Upon F. Jay Haynes' death Jack inherited the Haynes studio business outside of Yellowstone, together with his father's archive of negatives shot over forty years of photography across the northern U.S.
From the guide to the Haynes Family Photographs, 1866-1969, (Montana State University-Bozeman Library, Merrill G Burlingame Special Collections)