Balliol was just down the Woodstock Road from Infirmary, but I didn’t dare risk it. I went round to the ambulance entrance, up to Adelaide and through a yard to Walton Street. If Somerville was open, I could cut through its quad to Little Clarendon and down Worcester to the Broad, and come in through Balliol’s back gate.

Somerville was open, but the journey took a good deal longer than I thought it would, and when I did reach the gate, something had happened to it. It had been twisted in on itself, and the ironwork scrolls had been bent into prongs and hooks and points, which kept catching on my coveralls.

At first I thought it was bomb damage, but that couldn’t be right. The Luftwaffe was supposed to hit London tonight. And the gate, including prongs and points, had been painted a bright green.

I tried sidling through crabwise, but the epaulet on my non-AFS uniform caught on one of the hooks, and when I tried to back out, I got even more entangled. I flailed about wildly, trying to free myself.

“Let me help you there, sir,” a polite voice said, and I turned around, as much as I was able, and saw Mr. Dunworthy’s secretary.

“Finch,” I said. “Thank God you’re here. I was just coming to see Mr. Dunworthy.”

He unhooked the epaulet and took hold of my sleeve. “This way, sir,” he said, “no, not that way, through here, that’s it. No, no, this ways,” and led me, finally, to freedom.

But on the same side I’d been when I started. “This is no good, Finch,” I said. “We’ve still got to get through that gate into Balliol.”

“That’s Merton, sir,” he said. “You’re on their playing fields.”

I turned and looked where he was pointing. Finch was right. There was the soccer field, and beyond it the cricket ground, and beyond that, in Christ Church Meadow, the scaffolding-and-blue-plastic-covered spire of Coventry Cathedral.