[Lyford]

I want to say that it was Whitaker Chambers and he visited Moscow right after one of the Big 3 Conferences, probably Tehran

Uh, no. Chambers never worked for the government. He was a writer for a communist paper ("The Daily Worker", I think, but my copy of Witness is downstairs, and I'm not going to get it now...) and an agent for a Russian communist spy ring, but never a sleeper working for the government...

[KC_Conspirator]

Uh, sorry. Sometimes get the names of fellow travelers of the 30',s 40's, and 50's mixed up.