"Do you think he died a natural death, Smith?" I asked.

My friend reached across the table and rested the tip of a long finger upon one of the sub-headings to the account:

"SIR FRANK NARCOMBE SUMMONED TOO LATE."

"You see," said Smith, "Southery died during the night, but Sir Frank Narcombe, arriving a few minutes later, unhesitatingly pronounced death to be due to syncope, and seems to have noticed nothing suspicious."

I looked at him thoughtfully.

"Sir Frank is a great physician," I said slowly; "but we must remember he would be looking for nothing suspicious."

"We must remember," rapped Smith, "that, if Dr. Fu-Manchu is responsible for Southery's death, except to the eye of an expert there would be nothing suspicious to see. Fu-Manchu leaves no clews."

"Are you going around?" I asked.

Smith shrugged his shoulders.

"I think not," he replied. "Either a greater One than Fu-Manchu has taken Lord Southery, or the yellow doctor has done his work so well that no trace remains of his presence in the matter."