"If Jack Forsyth is still chief officer, I shall look him up," declared Smith. "You recall his brother, Petrie?"

"Naturally; since he was done to death in my presence," I replied; for the words awoke memories of one of Dr. Fu-Manchu's most ghastly crimes, always associated in my mind with the cry of a night-hawk.

"The divine afflatus should never be neglected," announced Nayland
Smith didactically, "wild though its promptings may seem."

CHAPTER XX

THE NOTE ON THE DOOR

I saw little of Nayland Smith for the remainder of that day. Presumably he was following those "promptings" to which he had referred, though I was unable to conjecture whither they were leading him. Then, towards dusk he arrived in a perfect whirl, figuratively sweeping me off my feet.

"Get your coat on, Petrie!" he cried; "you forget that we have a most urgent appointment!"

Beyond doubt I had forgotten that we had any appointment whatever that evening, and some surprise must have shown upon my face, for—

"Really you are becoming very forgetful!" my friend continued. "You know we can no longer trust the 'phone. I have to leave certain instructions for Weymouth at the rendezvous!"

There was a hidden significance in his manner, and, my memory harking back to an adventure which we had shared in the past, I suddenly glimpsed the depths of my own stupidity.