lower left in plate: Jos. Wright Pinxit; lower center in plate: J Boyedell Excudit Publish'd August 25, 1771; lower right in plate: Rd. Earlom fecit
Christopher Lennox-Boyd; (C. G. Boerner Limited, 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.
- C. G. Boerner Ltd. Mezzotints from the Collection of Christopher Lennox-Boyd. London, 2001: no. 27.