To tell the truth, I was pretty amazed myself. But in view of the general consternation it behooved me to be calm. I thanked the chemist, apologized for our intrusion at such an hour, and led my limp male acquaintances to the door.

The chemist waved my apologies aside.

“I do not ask questions. I do not ask if it is the Central Intelligence, the Federal Bureau, or perhaps Interpol. You will come for a beer, when it is over, and tell me what you can?”

“I may not be allowed to tell,” I said. “You understand?”

“Yes, yes. Foolish, this secrecy; but I know how they are, these people.”

I was tempted to linger; it was rather flattering to be taken for a lady spy.

The streets of the old town were silent under the moon. Shadows clung to the deep doorways and gathered under the eaves. I was in no mood to appreciate it. The past had come alive, but it had not brought the scent of romance or high adventure, only a dirty, ugly tragedy that would not die.

Nobody said anything till we got back to the Schloss. I was heading blindly for the door that would eventually lead to my beautiful bed when two hands caught at my arm. The hands belonged to two different people, but they moved with a unanimity that verged on ESP.

“Sit here,” said Tony, indicating a bench in the garden.

“Talk,” said Blankenhagen.

“I suppose it can’t wait till morning?” I yawned.

“I can’t wait till morning.” Tony sat me down and took his seat beside me. Blankenhagen sat down on my other side. I hunched my shoulders, feeling closed in.

“Also dann, sprich.” Blankenhagen was too absorbed to realize he had abandoned the formal third-person plural and was addressing me with the familiar form. “How did you know that a man dead for half a millennium had been poisoned with arsenic?”

I started out with a complete account of the story of the shrine, for the doctor’s benefit. I was pretty sure by then of Blankenhagen’s innocence, but it didn’t really matter; if he was guilty, he already knew, and if he didn’t know, it would not hurt to tell him.

Blankenhagen listened without comment. He didn’t have to say anything; his reactions were mirrored in his face, which I could see fairly well in the moonlight. I stressed the fact that we had no leanings toward larceny. If and when we found the shrine, we intended to hand it over to Irma.