From the Cistercian abbey at Bonnefont-en-Comminges and other nearby monasteries.; George Grey Barnard American, Bellefonte, Pennsylvania 1863–1938 New York, New York (until 1925)
Schrader, J. L. "George Grey Barnard: The Cloisters and the Abbaye." The Metropolitan Museum of Art Bulletin, n.s., 37, no. 1 (Summer 1979). pp. 34-37, fig. 45, 47.