ACROSS TOWN, Zaitzev took his time. He'd be able to write on only one message blank—throwing one away in plain view was too dangerous, the burn bag could not be trusted, and he could hardly light one up in his ashtray—and so he mentally composed his message, then rethought the words, then rethought them again, and again, and again.

The process took him more than an hour in full, and then he was able to write it up surreptitiously, fold it, and tuck it into his cigarette pack.