Paul Blackburn published two collections of troubadour poetry called "Proensa." The first was
1953's "Proensa: From the Provencal of Guillem de Peitau, Arnaut de Marueill, Raimbutz de Vaquieras, Sordello, Bernart de Ventadorn, Peire Vidal, Bertran de Born." The second, an expansion of the first, was
"Proensa: An Anthology of Troubadour Poetry," published posthumously in 1978, and edited by George Economou.
It is not clear which of those works this belongs to so I have not combined it.