Appears in exhibition catalog as entry no. 5, 6 (Sale info: $500.00 each).
5, 6. Two beautiful medals in bas-relief of marble, by John of Boulogne, representing the heads of Jesus and the Holy Virgin. They are surrounded with precious stones, are very ancient, and possess great merit; the more they are viewed the more they are admired. $500 each. [P. 14; exhibited under heading: "Marble Statuary."]
Synopsis of a Valuable Collection of Old Italian Paintings, and other rare Articles of Fine Arts in the possession of Mr. John Clark, now exhibiting at No. 281 Broadway, opposite the Washington Hotel, admittance 25 cents. New York: Scatcherd & Adams, Printers, No. 38 Gold Street. 1839.