The Maltese Falcon by Dashiell Hammett:
Samuel Spade’s jaw was long and bony, his chin a jutting v under the more flexible v of his mouth. His nostrils curved back to make another, smaller v. His yellow-grey eyes were horizontal. The v motif was picked up again by thickish brows rising outward from twin creases above a hooked nose, and his pale brown hair grew down—from high flat temples—in a point on his forehead. He looked rather pleasantly like a blond satan.