across lower center in plate: The Right Honble Elizabeth Countess of Northumberland; lower left in plate: P. Lellij Eques Pinxit; lower center in plate: I. Becket fecit.; lower right in plate: Sold by Alex Brown at ye blew ballcony in little Queen Street
Christopher Lennox Boyd; (Nicholas Stogdon, Oxford); 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.