Not to be mistaken for a stage actress of that name (1890-1947), this Margaret Callahan (August 12, 1910 - November 15, 1981) was a convent-educated beauty of Irish ancestry who found herself briefly thrust into the spotlight as one of those many ornamental 1930s Hollywood ingénues. First on stage with the Stuart Walker stock company in Cincinnati, then in summer stock on Long Island, she eventually made it to Broadway in 1934 and was near top-billed in a couple of short-lived plays. Having attracted the attention of talent scouts, Margaret wa…