wondered what that anonymous third party had made of every sentence and, when it came time to reply, I never could altogether vanquish him from my mind. I felt myself to be if not writing for him then leaving things out for him. This changed the tone of our letters, and must have been, in part at least, the purpose of the policy. Our exchanges, in the company of a suspicious authority, became self-conscious, wary of mentioning personal details or expressing easy intimacies.

