Jean le Rond d'Alembert. Colour mezzotint by P. M. Alix after M. de la Tour Maurice Quentin de La Tour
Thomas Pennant. Stipple engraving by R. Stanier, 1793, after T. Gainsborough, 1776 Thomas Gainsborough
John Smith. Stipple engraving by J.G. and G.S. Facius, 1797, after Sir J. Reynolds, 1765 Joshua Reynolds