The names of Saints Augustine, Jerome, and Gregory are inscribed on the books held by the angels. The absence of Saint Ambrose from the group (the heads are missing) indicates that the standard form of identifying the Church Fathers had not yet been established.
Sigismond Bardac(?), Paris; [ Arnold Seligmann (1860–1935), Cologne (sold 1919)]
Arts of the Middle Ages: A Loan Exhibition, February 17 to March 24, 1940. Boston: Museum of Fine Arts, 1940. no. 267, p. 77, pl. XXXI.
Pushkin Museum and State Hermitage Museum. Dekorativno-Prikladnoe Iskusstvo ot Pozdnei Antichnosti do Pozdnei Gotiki: Kratkii Katalog Vystavki. Moscow: Pushkin Museum, 1990. no. 31, pp. 11, 26, fig. 31.
State Hermitage Museum. Dekorativno-Prikladnoe Iskusstvo ot Pozdnei Antichnosti do Pozdnei Gotiki. St. Petersburg: State Hermitage Museum, 1990. no. 31, pp. 68-69.
McLachlan Elizabeth Parker. "Liturgical Vessels and Implements." In The Liturgy of the Medieval Church, edited by Thomas J. Heffernan, and E. Ann Matter. Consortium for the Teaching of the Middle Ages. Kalamazoo, Michigan: Western Michigan University, 2005. pp. 417-418, fig. 15.
Barnet, Peter, and Pete Dandridge, ed. Lions, Dragons, & Other Beasts: Aquamanilia of the Middle Ages, Vessels for Church and Table. New York: Bard Graduate Center for Studies in the Decorative Arts, Design, and Culture, 2006. no. 41, p. 183.
Mende, Ursula. Die mittelalterlichen Bronzen im Germanischen Nationalmuseum: Bestandskatalog. Nuremberg: Germanisches Nationalmuseum, 2013. p. 254.