"'Just drop the whole thing in, paper and all. Then if you feel a
faintness from the medicine the ammonia will quickly restore you.
One spoonful of the headache-powder swallowed quickly is enough.'"

No name was signed to the directions, but they were plainly written,
and "paper and all" was underscored heavily.

Craig pulled out some letters. "I have here specimens of writing
of many persons connected with this case, but I can see at a glance
which one corresponds to the writing on this red death-warrant by
an almost inhuman fiend. I shall, however, leave that part of it
to the handwriting experts to determine at the trial. Thurston, who
was the man whom you saw enter the Boncour bungalow as you left
- the constant visitor?"

Thurston had not yet regained his self-control, but with trembling
forefinger he turned and pointed to Halsey Post.

"Yes, ladies and gentlemen," cried Kennedy as he slapped the telegram
that had just come from New York down on the table decisively, "yes,
the real client of Kerr & Kimmel, who bent Thurston to his purposes,
was Halsey Post, once secret lover of Vera Lytton till threatened by
scandal in Danbridge - Halsey Post, graduate in technology, student
of sympathetic inks, forger of the Vera Lytton letter and the other
notes, and dealer in cyanides in the silver-smithing business,
fortune-hunter for the Willard millions with which to recoup the Post
& Vance losses, and hence rival of Dr. Dixon for the love of Alma
Willard. That is the man who wielded the poisoned pen. Dr. Dixon
is innocent.