maid said that it was Mrs. Boncour, and that she was deathly sick.
I ran into her room, and though she was beside herself with pain I
managed to control her, though she struggled desperately against me. I
was rushing her to the bathroom, passing through Miss Lytton's room.
'What's wrong?' I asked as I carried her along. 'I took some of that,'
she replied, pointing to the bottle, on the dressing-table.

"I put a small quantity of its crystal contents on my tongue. Then
I realized the most tragic truth of my life. I had taken one of the
deadliest poisons in the world. The odor of the released gas of
cyanogen was strong. But more than that, the metallic taste and the
horrible burning sensation told of the presence of some form of
mercury, too. In that terrible moment my brain worked with the
incredible swiftness of light. In a flash I knew that if I added malic
acid to the mercury--perchloride of mercury or corrosive sublimate--I
would have calomel or subchloride of mercury, the only thing that
would switch the poison out of my system and Mrs. Boncour's.

"Seizing her about the waist, I hurried into the dining-room. On a
sideboard was a dish of fruit. I took two apples. I made her eat one,
core and all. I ate the other. The fruit contained the malic acid
I needed to manufacture the calomel, and I made it right there in
nature's own laboratory. But there was no time to stop. I had to act
just as quickly to neutralize that cyanide, too. Remembering the
ammonia, I rushed back with Mrs. Boncour, and we inhaled the fumes.
Then I found a bottle of peroxide of hydrogen. I washed out her
stomach with it, and then my own. Then I injected some of the
peroxide into various Parts of her body. The peroxide of hydrogen
and hydrocyanic acid, you know, make oxamide, which is a harmless
compound.