Helen (Margaret) Hewitt was born in Granville, New York, on May 2, 1900. She received a Bachelor of Arts degree from Vassar College in 1921 and a Bachelor of Music degree from the Eastman School of Music in 1925. She traveled to France to study organ with Charles-Marie Widor and harmony with Nadia Boulanger at the American Conservatory in Fontainebleau. She also attended the Curtis Institute in Philadelphia and received a Master of Arts degree from Union Theological Seminary in 1932 and at Columbia University in 1933. After further European study with Heinrich Besseler at the University of Heidelberg she completed the Ph.D. degree at Harvard University in 1938.
Hewitt began her teaching career at the State Normal School in Potsdam, New York (1925–28). She later taught at the Florida State College for Women (1938–39) and Hunter College (1942). She was appointed to the faculty at North Texas State Teachers College at Denton (now the University of North Texas) in 1942 and was one of the founders of the doctoral program in music there. She remained on the faculty until her retirement in 1969. (Biographical information from Texas State Historical Association Website)