We are grateful to Dr. Catherine Puglisi who has informed us that the central figure group depends upon Albani's Nativity in the Church of San Bartolomeo, Bologna. The transposition to a landscape setting probably reflects a lost easel painting by Albani, which was recorded in an engraving by G. Filloeul (Paris, Bibliothèque Nationale, Cabinet des Estampes, Bd. 31, fol. 4)