There are no guidelines for historians, and no restrictions either. I could tell everyone I’m from the future if I thought they would believe me. I could murder Hitler if I could get to Germany. Or could I? Time paradox talk abounds in the history department, and the graduate students back from their practica don’t say a word one way or the other. Is there a tough, immutable past? Or is there a new past every day and do we, the historians, make it? And what are the consequences of what we do, if there are consequences? And how do we dare do anything without knowing them? Must we interfere boldly hoping we do not bring about all our downfalls? Or must we do nothing at all, not interfere, stand by and watch St. Paul’s burn to the ground if need be so that we don’t change the future?

All those are fine questions for a late-night study session. They do not matter here. I could no more let St. Paul’s burn down than I could kill Hitler. No, that is not true. I found that out yesterday in the Whispering Gallery. I could kill Hitler if I caught him setting fire to St. Paul’s.

September 26—I met a young woman today. Dean Matthews has opened the church, so the watch have been doing duties as chars and people have started coming in again. The young woman reminded me of Kivrin, though Kivrin is a good deal taller and would never frizz her hair like that. She looked as if she had been crying. Kivrin has looked like that since she got back from her practicum. The Middle Ages were too much for her. I wonder how she would have coped with this. By pouring out her fears to the local priest, no doubt, as I sincerely hoped her look-alike was not going to do.

“May I help you?” I said, not wanting in the least to help. “I’m a volunteer.”

She looked distressed. “You’re not paid?” she said, and wiped at her reddened nose with a handkerchief. “I read about St. Paul’s and the fire watch and all, and I thought perhaps there’s a position there for me. In the canteen, like, or something. A paying position.” There were tears in her red-rimmed eyes.