[7] Starting from 1944, Lui managed to land a series of low-level support staff positions with foreign embassies in Moscow, which got him into trouble with the NKVD; he was arrested in Leningrad around 1946 and later tried and sentenced to 25 years of labour camps on espionage charges (Article 58).

[15] Louis reported that the Soviet Union might be considering a preventive nuclear attack against China as well as the information about the Moscow metro bombing of 1977; he ascribed the latter to dissidents, which gave the authorities a pretext for a harsh crackdown.

[4] In 1968, a few months before the publication of Twenty Letters to a Friend by Joseph Stalin's daughter Svetlana Alliluyeva (who had defected two years prior), Louis brought out the KGB's unauthorized copy in Germany to damp the sensation.

[4] He had an opulent dacha at Bakovka[3] west of Moscow, "where he lived like a millionaire";[6] he also had a series of expensive cars, including the makes of Porsche, Bentley and Mercedes-Benz, some of them vintage.

[18] He was survived by his wife (since November 1958) – UK-born Jennifer Margaret, née Statham, a former nanny to a diplomat at the British Embassy in Moscow[5][17] and three sons by her: Anthony, Michael, and Nicholas.