At St. Olaf's Place I took a carriage; I didn't want to lose a minute.

An uncomfortable feeling possessed me that some misfortune was pending, or had already occurred. I do not know if one can really have a presentiment without some material cause; in this case the feeling had sufficient ground by old Frick's abrupt message.

At the outer gate stood Frick himself, holding it open for me. He locked the gate carefully after us, stuck the key in his pocket, and then said, as he stopped in front of me, with his hands in his pockets:—

"The black tortoise is gone again!"

"Gone?"

"Yes, gone! Stolen, I say," and he raised his voice.

I asked him not to speak so loudly and to explain the matter. It was a relief for me to hear that it was nothing worse. Little did I suspect that anything worse could have happened.

"There is no one about who can hear us," said Frick. "It is as I say; the black tortoise has been stolen again, and within the last few hours. Since five o'clock."

I looked at my watch; it was exactly twenty-five minutes to eight.

"How can you be sure it happened after five o'clock? Didn't the black tortoise lie in the case with the iron shutters, in the museum?"