[3]At the end of the 1930s, she corresponded with Nadia Boulanger, French composer, conductor, and teacher, and was directed by her, often with Hugues Cuénod as a tenor:[4] In September 1941, in Paris, Arthur Honegger dedicated to Pérugia the cycle Saluste du Bartas, performed on March 21, 1942, by the same Pérugia, who created the cycle, accompanied by Irène Aïtoff, at Salle Gaveau, Paris.
She was a frequent lecturer in many conservatories around the world, working for the Ministry of Foreign Affairs: London, Amsterdam, Rome, Buenos Aires, and many more.
Bosmans was Benjamin Britten and Peter Pears's good friend, and they called her "Jetty"; in March 1942, Pears writes to Britten:She is feeling happy now, because some songs she wrote for Noémie Pérugia had a great success 10 days ago, it appears.
[12]In 1951 the composer Maurice Thiriet dedicated to Pérugia Fleurs (Flowers), 6 poems which he put in music according to the texts of Blanche Pierre-Biez.
On November 28, 1953 she sang for the first time on a French Radio two songs by Charles Koechlin, from Opera 68: Deux mélodies for Soprano, Hymne à Vénus (Villiers de l'Isle-Adam) and Dissolution (Paul Claudel, from La connaissance de l'est).