across bottom of plate: Petrus Lellij Eques Pictor Caroli 2. di / Magna Britannia Franciae Hibernia Regis. / Petrus Lelliu Eques pinxit; I. Becket Cum Privelegio Regis; Sold by Alex Browne at ye blew / ballcony in little Queen Street
(Hill-Stone Inc., New York); purchased 2001 by NGA.
- Smith, John Chaloner. British mezzotinto portraits, being a descriptive catalogue of these engravings from the introduction of the art to the early part of the present century. 4 vols. London: Henry Sotheran and Co., 1884.