2
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VII THE ARROW POISON
VIII THE ANONYMOUS LETTER
IX THE PAPER FIBRES
X THE X-RAY READER
XI THE SHOE-PRINTS
XII THE EVIL EYE
XIII THE POISONED CIGARETTE
XIV THE INTERFEROMETER
XV THE WEED OF MADNESS
XVI THE EAR IN THE WALL
XVII THE VOICE FROM THE AIR
XVIII THE ANTIDOTE
XIX THE BURGLAR POWDER
XX THE PULMOTOR
XXI THE TELESCRIBE
XXII THE VANISHER
XXIII THE ACETYLENE TORCH
XXIV THE POLICE DOG
XXV THE GOLD OF THE GODS
I
THE PERUVIAN DAGGER
"There's something weird and mysterious about the robbery, Kennedy. They took the very thing I treasure most of all, an ancient Peruvian dagger."
Professor Allan Norton was very much excited as he dropped into Craig's laboratory early that forenoon.
Norton, I may say, was one of the younger members of the faculty, like Kennedy. Already, however, he had made for himself a place as one of the foremost of South American explorers and archaeologists.
"How they got into the South American section of the Museum, though, I don't understand," he hurried on. "But, once in, that they should take the most valuable relic I brought back with me on this last expedition, I think certainly shows that it was a robbery with a deep-laid, premeditated purpose."
"Nothing else is gone?" queried Kennedy.
"Nothing," returned the professor. "That's the strangest part of it--to me. It was a peculiar dagger, too," he continued reminiscently. "I say that it was valuable, for on the blade were engraved some curious Inca characters. I wasn't able to take the time to decipher them, down there, for the age of the metal made them almost illegible. But now that I have all my stuff unpacked and arranged after my trip, I was just about to try--when along comes a thief and robs me. We can't have the University Museum broken into that way, you know, Kennedy."
"I should say not," readily assented Craig. "I'd like to look the place ov