“What time did Mr. Kara say he would be back?”

“At six o'clock, miss,” the man replied.

“There is rather an important letter here which has to be delivered.”

“Shall I ring up for a messenger?”

“No, I don't think that would be advisable. You had better take it yourself.”

Kara was in the habit of employing Fisher as a confidential messenger when the occasion demanded such employment.

“I will go with pleasure, miss,” he said.

It was a heaven-sent opportunity for Fisher, who had been inventing some excuse for leaving the house. She handed him the letter and he read without a droop of eyelid the superscription:

“T. X. Meredith, Esq., Special Service Dept., Scotland Yard, Whitehall.”

He put it carefully in his pocket and went from the room to change. Large as the house was Kara did not employ a regular staff of servants. A maid and a valet comprised the whole of the indoor staff. His cook, and the other domestics, necessary for conducting an establishment of that size, were engaged by the day.