Portrait of a Black girl

William Henry Hunt

 Portrait of a Black girl 1830 - 1835
The Royal Family at the Royal Academy

Johann Heinrich Ramberg

 The Royal Family at the Royal Academy 1787
Portrait of a boy

John Singleton Copley

 Portrait of a boy (circa?) 1776
Study for 'The Apotheosis of the Princes Octavius and Alfred' (Buckingham Palace)

Benjamin West

 Study for 'The Apotheosis of the Princes Octavius and Alfred' (Buckingham Palace) 1783