T. T. Flynn
According to the bio on Fantastic Fiction: "Theodore Thomas Flynn (better known as T.T. Flynn, western and detective fiction author) is nowadays remembered for his book, The Man from Laramie, which was made into a successful movie. He also wrote a series of stories about Mr. Maddox, a bookie detective, in Dime Detective; another series about a P.I. couple Trixie and Mike in Detective Fiction Weekly; and wrote western stories for Adventure, Short Stories, Star Western, and Argosy.