Haydon also took it for granted that secret services were the only real measure of a nation's political… — John le Carré

"If I couldn't get out, if there was any fumble after I'd met Stevcek, if I had to go underground, I must get the one word to him even if I had to go to Prague and chalk it on the Embassy door…Tinker, Tailor, Soldier, Sailor. Alleline was Tinker, Haydon was Tailor, Bland was Soldier and Toby Esterhase was Poorman. We dropped Sailor because it rhymed with Tailor. You were Beggarman," Jim said.

Witchcraft No. 4 was an immensely technical Soviet Foreign Service appreciation of the advantages and disadvantages of negotiating with a weakened American president. The conclusion, on balance, was that by throwing the President a bone for his own electorate, the Soviet Union could buy useful concessions.

“George is like a swift,” Ann had once told Haydon in his hearing. “He cuts down his body temperature till it's the same as the environment. Then he doesn't lose energy adjusting.”