Papers tiered around the lab like ornate white hand fans, scrawled with his brittle, black- inked handwriting and chemical equations, revealed that Dr. William Chess’ research was extremely organized. Dr. Chess, detective Rook Black quickly surmised, took pride in his ability to discern the scents of numerous species of grass. A framed photo showed the white haired Dr. Chess blindfolded, an assistant waving a small vial of oil borne grass extract under his nose. Name that grass, Rook thought, name that blood.