owed no signs of improvement by that time, I undertook to
inquire at the hospital for a properly qualified nurse.

Later in the day, our doubts of the doctor were confirmed. He betrayed
his own perplexity in arriving at a true "diagnosis" of the patient's
case, by bringing with him, at his second visit, a brother-physician,
whom he introduced as Doctor Dormann, and with whom he asked leave to
consult at the bedside.

The new doctor was the younger, and evidently the firmer person of the
two.

His examination of the sick man was patient and careful in the extreme.
He questioned us minutely about the period at which the illness had
begun; the state of Mr. Keller's health immediately before it; the first
symptoms noticed; what he had eaten, and what he had drunk; and so on.
Next, he desired to see all the inmates of the house who had access to
the bed-chamber; looking with steady scrutiny at the housekeeper, the
footman, and the maid, as they followed each other into the room--and
dismissing them again without remark. Lastly, he astounded his old
colleague by proposing to administer an emetic. There was no prevailing
on him to give his reasons. "If I prove to be right, you shall hear my
reasons. If I prove to be wrong, I have only to say so, and no reasons
will be required. Clear the room, administer the emetic, and keep the
door locked till I come back."

With those parting directions he hurried out of the house.

"What _can_ he mean?" said Mr. Engelman, leading the way out of the
bedchamber.

The elder doctor left in charge heard the words, and answered them,
addressing himself, not to Mr. Engelman, but to me. He caught me by the
arm, as I was leaving the room in my turn.

"Poison!" the doctor whispered in my ear. "Keep it a secret; that's what
he means."

I ran to my own bedchamber and bolted myself in. At that one word,
"Poison," the atrocious suggestion of Frau Meyer, when she had referred
to Doctor Fontaine's lost medicine-chest, instantly associated itself in
my memory with Madame Fontaine's suspicious intrusion into Mr. Keller's
room. Good God! had I not surprised her standing close by the table on
which the night-drink was set? and had I not heard Doctor Dormann say,
"That's unlucky," when he was told that the barley-water had been all
drunk by the patient, and the jug and glass washed as usual? For the
first few moments, I really think I must have been beside myself, so
completely was I overpowered by t