Autograph: Letter from Jean-Jacques Rousseau without an addressee, stating his reasons for not writing further in support of the French Protestants, and referring to what he had already written. Written in French, 15 July 1764.  Signature: Jean-Jacques Rousseau.  Genevan philosopher, writer and composer of 18th-century Romanticism, 28 June 1712  – 2 July 1778. Source: British Museum.  (Photo by Culture Club/Getty Images) *** Local Caption ***