Robert N. Mullin (1893-1982) was a writer of Western history and the author of several publications about Billy the Kid, and the Lincoln County War.
Robert Norville Mullin was the son of Joseph P. Mullin and Charlotte Norville. He married Josephine Plumridge in 1916.
In his early career, Robert N. Mullin lived in Toledo, Ohio, and was a senior executive of a Chicago oil company.
Tombstone A.T. : business section, May 1882, by Robert N. Mullin, 1950New Light on the Legend of Billy the Kid, New Mexico Folklore Record, 6 (1953), 1-5. Philip J. Rasch and Robert N. Mullin.Dim Trails: The Pursuit of the McCarty Family, New Mexico Folklore Record, 8 (1954), 6-11. Philip J. Rasch and Robert N. Mullin.A Chronology of the Lincoln County War : scene: Mostly Lincoln County, New Mexico, time: mainly 1877-1881, by Robert N. Mullin, 1966The Boyhood of Billy the Kid, by Robert N. Mullin, 1967The Key to the Mystery of Pat Garrett, by Robert N. Mullin, 1969The Strange Story of Wayne Brazel, by Robert N. Mullin, 1970An Item from old Mesilla, by Robert N. Mullin, 1971Tombstone, Arizona Territory, circa 1881-82, by Robert N. Mullin, 1971Stagecoach Pioneers of the Southwest, by Robert N. Mullin, 1983