From 1962 on, he worked with Pierre Seghers on the collection "Poètes d'aujourd'hui" until Robert Laffont bought the editions in 1969.
His involvement in publishing was reinforced by his participation in the Centre national des Lettres from 1975 to 1983 in the commissions "Poésie" and "Revue".
This work was followed by other studies on Johannes Brahms, Samuel Taylor Coleridge, Théophile Gautier, Paul Morand and Mathieu Bénézet, where one could notice an attraction for the romanticism and modernity of the early twentieth century.
In addition to these monographs, his work was distinguished as that of an anthologist, since he was the author of three works that have become classics and hailed as such by critics: La Poésie symboliste (Bernard Delvaille will be rewarded with the Prix Henri-Mondor in 1983 for his work on symbolism and Mallarmé), La Nouvelle poésie française, which drew up an inventory of poetic hopes in the mid-1970s and Mille et cent ans de poésie française, a sum of more than a thousand pages listing the great poets from the eleventh to the mid-twentieth.
Delvaille was the author of a poetic work published in 2006 in which he developed the themes of journey, wandering, happiness and death.