Among her publications were the first volume of Illustreret Musikhistorie (Illustrated History of Music, 1897) and Middelalderens Strengeinstrumenter og deres Forløbere i Oldtiden (1928), published in English as The Stringed Instruments of the Middle Ages: Their Evolution and Development.
In 1898, together with the composer Louis Glass, she founded the Dansk Musikpædagogisk Forening (Danish Music Education Association).
[1] While her brother Peter followed in his father's footsteps as a physician, Hortense Panum turned to music, taking piano lessons under Victor Bendix and August Winding while studying theory and composition under Orla Rosenhoff.
She subsequently widened her knowledge of the subject by visiting libraries and museums in Germany, France, Belgium and Scandinavia.
[2] Her most important work was Middelalderens Strengeinstrumenter og deres Forløbere i Oldtiden (1928), published in English in 1939 as The Stringed Instruments of the Middle Ages: Their Evolution and Development.