“Be calm, Axel, and reasonable. This dagger belongs to the sixteenth century; it is a poniard, such as gentlemen carried in their belts to give the coup de grâce. Its origin is Spanish. It was never either yours, or mine, or the hunter’s, nor did it belong to any of those human beings who may or may not inhabit this inner world. See, it was never jagged like this by cutting men’s throats; its blade is coated with a rust neither a day, nor a year, nor a hundred years old.”

The Professor was getting excited according to his wont, and was allowing his imagination to run away with him.

“Axel, we are on the way towards the grand discovery. This blade has been left on the strand for from one to three hundred years, and has blunted its edge upon the rocks that fringe this subterranean sea!”

“But it has not come alone. It has not twisted itself out of shape; someone has been here before us!”

“Yes⁠—a man has.”