Bertha Muzzy Sinclair or Sinclair-Cowan, née Muzzy (November 15, 1871 - July 23, 1940), best known by her pseudonym B. M. Bower, was an American author who wrote novels, fictional short stories, and screenplays about the American Old West. Her works, featuring cowboys and cows of the Flying U Ranch in Montana, reflected "an interest in ranch life, the use of working cowboys as main characters (even in romantic plots), the occasional appearance of eastern types for the sake of contrast, a sense of western geography as simultaneously harsh and grand, and a good deal of factual attention to such matters as cattle branding and bronc busting." She was married three times: to Clayton Bower in 1890, to Bertrand William Sinclair (also a Western author) in 1905, and to Robert Elsworth Cowan in 1921. However, she chose to publish under the name Bower.Early lifeBorn Bertha Muzzy in Otter Tail County, Minnesota, to Washington Muzzy and Eunice Miner Muzzy, Bower moved with her family to a dryland homestead near Great Falls, Montana, in 1889. That fall, just before her eighteenth birthday, she began teaching school in nearby Milligan Valley. The school was a small, hastily converted log outbuilding, and she taught twelve pupils. Her experiences as a teacher informed the characters of schoolma'ams who appear frequently in her in the writings, notably in The North Wind Do Blow (1937), in which a young, eastern-born schoolma'am teaches her first term in central Montana. After one term as a schoolteacher, Bower returned to her family's homestead.Writing careerBower began writing to "save my sanity" after moving to Big Sandy with her first husband. Seeking financial independence from Clayton, she began sending stories to publishers in 1900. She regularly wrote new material while continuing to send out her old stories once a month. Bower published her first short story, "Strike of the Dishpan Brigade," locally in 1901. Her first short story to be published nationally, "Ghost in the Red