Dr. G.F. Waagen, Treasures of Art in Great Britain, London 1854, III, p. 219.
Catalogue of Pictures at Combe Abbey, 1866, no. 230.
O. Millar, The Tudor, Stuart and early Georgian Pictures in the Royal Collection, London, I, 1963, p.81.
R. Strong, Tudor and Jacobean Portraits, I, London, 1969, p. 179.
A.W. Ward, The Electress Sofia, 1903, illus. opposite p. 4.
London, National Portrait Gallery, 1866.