Read it through once

“There’s a half-sovereign for you,” my companion said, standing up and taking his hat. “I am afraid, Rance, that you will never rise in the force. That head of yours should be for use as well as ornament. You might have gained your sergeant’s stripes last night. The man whom you held in your hands is the man who holds the clue of this mystery, and whom we are seeking. There is no use of arguing about it now; I tell you that it is so. Come along, Doctor.”