lower center in plate: Johannes Locke. / Ob. A.D. 1704. Aetat. 72. / Ex Autographo G. Kneller Baronti pro Ant. Collins Arm. eodem Anno depicto. Fecit J. Smith Ae. 1721
- 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.