Lesueur, P. A. (1770-1850) & Lesueur, J.B. (1750-1850); French. Medium: gouache. Date: 18th Century. Antoine Lavoisier (1743-94); known as the 'father of modern chemistry'; recognised and named oxygen and hydrogen; executed during the Reign of Terror; Committee of General Security issued warrants of arrest (mandats d'arret); Malesherbes (1721-94); French statesman, minister and counsel for the defence of Louis XVI at this trial during the French Revolution; guillotined on 23rd April, 1794; Provenance: Private Collection / Giraudon. Photographic Rights The Bridgeman Art Library.