Who’s Who of Soviet spying, smuggled out by dissident in 1992, finally published
Files smuggled out of Russia in 1992 by KGB archivist US and Britain saw as 'most important single intelligence source ever' finally revealed

The papers spent years hidden in a milk churn beneath a Russian cottage and read like an encyclopedia of cold war espionage.

The files, smuggled out of Russia in 1992 by senior KGB official Vasili Mitrokhin, describe sabotage plots, booby-trapped weapons caches and armies of agents under cover in the West.
They reveal top-quality spies could be hard to get.
The papers show that some were given Communist honours and pensions by a grateful USSR, but others proved loose-lipped, drunk or unreliable.
Espionage historian Christopher Andrew said the vast dossier, released by the Churchill Archives Centre at Cambridge University, was considered "the most important single intelligence source ever" by British and American authorities.