We bowed ourselves out, and, after waiting a few moments about the
hotel without seeing Whitney anywhere, Craig called a car.
"They were right," was his only comment. "A most baffling woman,
indeed."
VII
THE ARROW POISON
Back again in the laboratory, Kennedy threw off his coat and
plunged again into his investigation of the blood sample he had
taken from the wound in Mendoza's body.
We had scarcely been back half an hour before the door opened and
Dr. Leslie's perplexed face looked in on us. He was carrying a
large jar, in which he had taken away the materials which he
wished to examine.
"Well," asked Kennedy, pausing with a test-tube poised over a
Bunsen burner, "have you found anything yet? I haven't had time to
get very far with my own tests yet."
"Not a blessed thing," returned the coroner. "I'm desperate. One
of the chemists suggested cyanide, another carbon monoxide. But
there is no trace of either. Then he suggested nux vomica. It
wasn't nux vomica; but my tests show that it must have been
something very much like it. I've looked for all the ordinary
known poisons and some of the little-known alkaloids, but,
Kennedy, I always get back to the same point.
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