* * * * *

"Sir," said Dr. Campbell, "I shall be sorry to lose your society, but you must choose between that house and mine. I have special and family reasons why I cannot be intimate with any visitor to Mr.——ah, Roger!"

I had found the doctor lying on his couch, as was his custom, his curious Oriental tray beside him, and an acrid tang in the air; but at my first words about my visit he shook off his dreamy abstraction and sat up.

"To tell you the truth, Campbell," I said, as calmly as possible, for, of course, I could not allow any one (except Nance) to dictate to me, "I was singularly interested in the young man, and—he told his tale, as it seemed to me, quite frankly. If I am not to call upon him, I must ask you as to your reasons for a request so singular."

"It is not a request, McQuhirr," said the doctor, passing his hand across his brow as if to clear away moisture. "It is only a little information I give you for your guidance. If you wish to visit this young man—well, I am deeply grieved, but I cannot receive you here, or have any intercourse with you professionally."

"That is saying too much or too little," I replied; "you must tell me your reasons."

Then he hesitated, looking from side to side in a semi-dazed way.

"I would rather not—they are family reasons!" he stammered, as he spoke.

"There is such a thing as the seal of the profession," I reminded him.

"Well," he said at last, "I will tell you. That young man is my nephew, the son of my elder brother. His name is not Roger, but Roger Campbell. His mother was my poor brother's housekeeper. He married her some time after his first wife's death. This boy was their child, and, like a cuckoo in the nest, he tried from the first to oust his elder brother—the child of the dead woman. Indeed, but for my interference his mother and he would have done it between them; for my brother was latterly wholly in their hands.