It wasn't carbon monoxide or
illuminating-gas. And you, Mr. Whitney, were right about the
poison, too. Only it is a poison neither of you ever heard of."
"What is it?" we asked simultaneously.
"Let me take these samples and make some further tests. I am sure
of it, but it is new to me. Wait till to-morrow night, when my
chain of evidence is completed. Then you are all cordially
invited to attend at my laboratory at the university. I'll ask
you, Mr. Whitney, to come armed with a warrant for John or Jane
Doe. Please see that the Wainwrights, particularly Marian, are
present. You can tell Inspector O'Connor that Mr. Vanderdyke and
Mrs. Ralston are required as material witnesses--anything so long
as you are sure that these five persons are present. Good night,
gentlemen."
We rode back to the city in silence, but as we neared the
station, Kennedy remarked: "You see, Walter, these people are
like the newspapers. They are floundering around in a sea of
unrelated facts. There is more than they think back of this
crime. I've been revolving in my mind how it will be possible to
get some inkling about this concession of Vanderdyke's, the
mining claim of Mrs. Ralston, and the exact itinerary of the
Wainwright trip in the Far East. Do you think you can get that
information for me? I think it will take me all day to-morrow to
isolate this poison and get things in convincing shape on that
score.
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