Declassified files reveal an interesting chain of communications of Samar Guha with teh Russian president Gorbachev requesting for for information on Subhas Bose in Russia. Guha narrates the following story - Ardhendu Sarkar, a Bengali engineer working for Heavy engineering corporation in Ukraine had a most fascinating story to tell. Sarkar worked in Machine Building Plant in Gorlovska near the city Doniesk. While working on a site in USSR, his colleague Zerovin, a German Jew, who was the deputy chief of the plant in which he was working, told Sarkar that he had met Bose in Berlin in 1941 and therefore knew him quite well. Zerovin said that he was captured by the Russians after the fall of Berlin and was sent to a reorientation camp in Siberia. The camp was in Siberian-Mongolian border. Zerovin said that in that reorientation camp which was meant for foreign politicians and professionals, he met Subhas Chandra Bose. Bose was given a diplomat status by Russia and had a car and two private Mongolian bodyguards who might have been KGB men. It appeared to him that Bose was well looked after. Zerovin approached Bose and told him that he had met him in Berlin, Bose replied that it was quite likely. Bose also told him that he was likely to return to India soon. When they began to speak in German, the Mongolian bodyguard intervened and said "not allowed". Zerovin also warned Sarkar not to disclose the incident in Russia as it would endanger them both. Ardhendu reported this to the second secretary in charge of the Indian consulate in Moscow with the result that he had to lose his job and had to come back to India. Nobody would believe him and he almost lost his career. Sarkar told Samar Guha about this incident and also revealed that Bose was present in Russia atleast until 1961
more on Metamorphosis chapter of https://www.netajisubhasbose.org/