^Only Charpentier’s name appears as librettist on all printed sources, but evidence unearthed by Saint-Pol-Roux’s biographer published in 1952 noted that among the poet’s papers were 'about fifty pages' which contained multiple drafts for the libretto. At some point after the spectacularly successful premiere, Saint-Pol-Roux seems to have relinquished his rights to Charpentier for a lump-sum payment. See Huebner S. French Opera at the Fin de Siècle. Oxford University Press, Oxford, 1999.