Dr. Rowen MD., was an Ear, Nose and Throat doctor in Miles City, still practicing when I moved to California in 1952. I don't recall a Doctor Rowland, but perhaps he/she was there , and I just don't remember....
Myrtle was (according to the ebay listing) a chiropractor, electrotherapist, and foot specialist. Her office is listed on the calendar and as I recall, was somewhere around the old First National Bank building.