Robert Edmund Graves, Dictionary of National Biography… (1891)
“ Hilliard's miniatures are usually on card or vellum, and sometimes on the backs of playing cards. They are executed with much care and fidelity and great accuracy of detail in costume, and are painted with opaque colours, heightened with gold, but the faces are pale and shadowless. Thirteen were in the cabinet of Charles I, who purchased from Hilliard's son a remarkable jewel, containing the portraits of Henry VII, Henry VIII, Edward VI, and Queen Jane Seymour, and having on the top an enamelled representation of the battle of Bosworth, and on the reverse the red and white roses. ”
