Sergey Prokudin-Gorsky
In 1920, Prokudin-Gorsky remarried and had a daughter with his assistant Maria Fedorovna née Schedrimo. The family finally settled in Paris in 1922, reuniting with his first wife and children. Prokudin-Gorsky set up a photo studio there together with his three adult children, naming it after his fourth child, Elka. In the 1930s, the elderly Prokudin-Gorsky continued with lectures showing his photographs of Russia to young Russians in France, but stopped commercial work and left the studio to his children, who named it Gorsky Frères. He died in Paris on September 27, 1944, a month after the Liberation of Paris. He is buried in the Sainte-Geneviève-des-Bois Russian Cemetery.
Abram Slutsky
There are two unofficial accounts of Slutsky's death. The first appeared in Orlov's "Secret History of Stalin's Crimes" (1953) and presumably is based on gossip Orlov heard in France or Spain in 1938. In Orlov's version, Slutsky was invited to a meeting in the office of Mikhail Frinovsky, head of the GUGB, in the Lubyanka. Shortly afterward, his deputy, Sergei Shpigelglas, was called into the office and he observed Slutsky slumped in a chair with tea and cakes at the table beside him. Frinovsky said Slutsky had died suddenly of a heart attack. The chief of the NKVD, Nikolai Yezhov, ordered Slutsky's body put in the main hall of the NKVD club and surrounded by an honor guard of NKVD officers. However, the embalmers neglected to cover the tell-tale spots on Slutsky's face which indicated to the mourners that he had been poisoned with hydrocyanic acid.