“Is there anything more,” the doctor asked, “that can be done for your comfort?”

“Nothing at present,” Mr. Dunster replied. “My head aches now, but I think that I shall want to leave before three days are up. Are you the doctor in the neighbourhood?”

Sarson shook his head.

“I am physician to Mr. Fentolin’s household,” he answered quietly. “I live here. Mr. Fentolin is himself somewhat of an invalid and requires constant medical attention.”

Mr. Dunster contemplated the speaker steadfastly.

“You will forgive me,” he said. “I am an American and I am used to plain speech. I am quite unused to being attended by strange doctors. I understand that you are not in general practice now. Might I ask if you are fully qualified?”

“I am an M.D. of London,” the doctor replied. “You can make yourself quite easy as to my qualifications. It would not suit Mr. Fentolin’s purpose to entrust himself to the care of any one without a reputation.”

He left the room, and Mr. Dunster closed his eyes. His slumbers, however, were not altogether peaceful ones. All the time there seemed to be a hammering inside his head, and from somewhere back in his obscured memory the name of Fentolin seemed to be continually asserting itself. From somewhere or other, the amazing sense which sometimes gives warning of danger to men of adventure, seemed to have opened its feelers. He rested because he was exhausted, but even in his sleep he was ill at ease.

The doctor, with the telegrams in his hand, made his way down a splendid staircase, past the long picture gallery where masterpieces of Van Dyck and Rubens frowned and leered down upon him; descended the final stretch of broad oak stairs, crossed the hall, and entered his master’s rooms. Mr. Fentolin was sitting before the open window, an easel in front of him, a palette in his left hand, painting with deft, swift touches.

“Ah!” he exclaimed, without looking around, “it is my friend the doctor, my friend Sarson, M.D. of London, L.R.C.P. and all the rest of it. He brings with him the odour of the sick room. For a moment or two, just for a moment, dear friend, do not disturb me. Do not bring any alien thoughts into my brain. I am absorbed, you see—absorbed. It is a strange problem of colour, this.”