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Believed to be John Newton Dunn who went by Newton Dunn most of the time some times spelled Newton as Nuten. He was from the Kansas and Missouri area.
Also in the photograph, his wife, Eathel Lilly Bates and their son. They married in 1909 divorced in 1912. Newton Dunn probably remarried.
Do you have more information on John Newton Dunn? Please let me know.