The material available for picturing to us the performances of the popular religious plays of mediæval France is so meagre that any possible addition to it seems worth investigating. Some valuable plates, reproducing the miniatures that accompany the Passion plays of Arras and Valenciennes, have been published by G. Cohen in his Théâtre en France au moyen âge, I (Paris: Rieder, 1928). The same author had previously given us a comprehensive treatment of the whole subject, with a full bibliography and a few other plates, in his Histoire de la mise en scène dans le théâtre religieux (2nd ed., Paris: Champion, 1926). Many suggestive hypotheses regarding the possible contributions of the mediæval stage to the art of the middle ages have been advanced by Émile Mâle in the two beautifully illustrated volumes, L'Art religieux du xiie siècle (3rd ed., Paris: Colin, 1928), chap. IV and L'Art religieux de la fin du moyen âge (3rd ed., Paris: Colin, 1925), chap. II. In both of these, various iconographical innovations are plausibly traced to the influence of the liturgical and vernacular plays. Except for the works just mentioned, however, we are largely left to descriptive material and conjecture for our ideas about the costuming, staging, and other conventions of the mediæval religious drama. This is the more to be regretted in view of M. Mâle's important conclusions, and it would therefore seem that any illustrations that may give us a conception of the popular iconography of the Passion in the middle ages possess a dual claim upon our attention.