Jacob Epstein of friends, casual acquaintances, and even people dragged from the street into his studio almost at random. He worked even on his dying day. He also painted; many of his watercolours and gouaches were of Epping Forest, where he lived (at Loughton) and sculpted. These were often exhibited at the Leicester Galleries in London. His "Monkwood Autumn" and "Pool, Epping Forest" date from 1944–45. Epstein was Jewish, and negative reviews of his work sometimes took on an antisemitic flavour, though he did not attribute the "average unfavorable criticism" of his work to antisemitism. Epstein met Albert Einstein at Roughton Heath,
Jacob Epstein (spy) the Gnome Project, which was the secret plan to free Ramón Mercader, Leon Trotsky's murderer, from jail. Epstein is referenced in Venona decrypt 800 New York to Moscow 28 May 1943, and another decrypt on 30 May 1943. The material cites Epstein as having placed two agents in the prison where Mercader was held. The plan called for moving Mercader out of Mexico once the jailbreak was made. Venona decrypt 193–194 Mexico City to Moscow, 14 March 1944 identifies Anna Colloms, while on a courier mission to Mexico, reporting the KGB detected surveillance of Ruth Wilson, Epstein's wife, and Colloms,