"ARSeNE LUPIN.

"P.S.--One word more, of which I feel sure that you will approve. As it is not right and proper that a gentleman who has had the glorious privilege of fighting under my banner should languish on the straw of your prisons, I feel it my duty to give you fair warning that, in five weeks' time, on Friday, the 31st of May, I shall set at liberty Master Jerome, promoted by me to the rank of chief messenger at the Ministry of the Interior. Don't forget the date: Friday, the 31st of May.

"A. L."

CHAPTER IV

PRINCE SERNINE AT WORK

A ground-floor flat, at the corner of the Boulevard Haussmann and the Rue de Courcelles. Here lived Prince Sernine: Prince Sernine, one of the most brilliant members of the Russian colony in Paris, whose name was constantly recurring in the "Arrivals and Departures" column in the newspapers.

Eleven o'clock in the morning. The prince entered his study. He was a man of thirty-eight or forty years of age, whose chestnut hair was mingled with a few silver threads on the temples. He had a fresh, healthy complexion and wore a large mustache and a pair of whiskers cut extremely short, so as to be hardly noticeable against the fresh skin of his cheeks.

He was smartly dressed in a tight-fitting frock-coat and a white drill waistcoat, which showed above the opening.

"Come on!" he said, in an undertone. "I have a hard day's work before me, I expect."

He opened a door leading into a large room where a few people sat waiting, and said:

"Is Varnier there? Come in, Varnier."

A man looking like a small tradesman, squat, solidly built, firmly set upon his legs, entered at the summons. The prince closed the door behind him:

"Well, Varnier, how far are you?"

"Everything's ready for this evening, governor."

"Good. Tell me in a few words."

"It's like this. After her husband's murder, Mrs. Kesselbach, on the strength of the prospectuses which you ordered to be sent to her, selected as her residence the establishment known as the Retreat for Gentlewomen, at Garches. She occupies the last of the four small houses, at the bottom of the garden, which the management lets to ladies who prefer to live quite apart from the other boarders, the house known as the Pavillon de l'Imperatrice."

"What servants has she?"

"Her companion, Gertrude, with whom she arrived a few hours after the crime, and Gertrude's sister Suzanne, whom she sent for to Monte Carlo and who acts as her maid. The two sisters are devoted to her."

"What about Edwards, the valet?"

"She did not keep him. He has gone back to his own country."

"Does she see people?"

"No. She spends her time lying on a sofa. She seems very weak and ill.

She cries a great deal. Yesterday the examining-magistrate was with her for two hours."

"Very good. And now about the young girl."

"Mlle. Genevieve Ernemont lives across the way ... in a lane running toward the open country, the third house on the right in the lane. She keeps a free school for backward children. Her grandmother, Mme.

Ernemont, lives with her."

"And, according to what you wrote to me, Genevieve Ernemont and Mrs.

Kesselbach have become acquainted?"

"Yes. The girl went to ask Mrs. Kesselbach for a subscription for her school. They must have taken a liking to each other, for, during the past four days, they have been walking together in the Parc de Villeneuve, of which the garden of the Retreat is only a dependency."

"At what time do they go out?"

"From five to six. At six o'clock exactly the young lady goes back to her school."

"So you have arranged the thing?"

"For six o'clock to-day. Everything is ready."

"Will there be no one there?"

"There is never any one in the park at that hour."

"Very well. I shall be there. You can go."

He sent him out through the door leading to the hall, and, returning to the waiting-room, called:

"The brothers Doudeville."

Two young men entered, a little overdressed, keen-eyed and pleasant-looking.

"Good morning, Jean. Good morning, Jacques. Any news at the Prefecture?"

"Nothing much, governor."

"Does M. Lenormand continue to have confidence in you?"

"Yes. Next to Gourel, we are his favorite inspectors. A proof is that he has posted us in the Palace Hotel to watch the people who were living on the first-floor passage at the time of Chapman's murder. Gourel comes every morning, and we make the same report to him that we do to you."

"Capital. It is essential that I should be informed of all that happens and all that is said at the Prefecture of Police. As long as Lenormand looks upon you as his men, I am master of the situation. And have you discovered a trail of any kind in the hotel?"

Jean Doudeville, the elder of the two, replied:

"The Englishwoman who occupied one of the bedrooms has gone."

"That doesn't interest me. I know all about her. But her neighbor, Major Parbury?"

They seemed embarrassed. At last, one of them replied:

"Major Parbury, this morning, ordered his luggage to be taken to the Gare du Nord, for the twelve-fifty train, and himself drove away in a motor. We were there when the train left. The major did not come."

"And the luggage?"