The larger bones had been labeled: left femur, left fibula, and so on. Mungan picked out a heavy bone about a foot long; it was marked “right humerus.” “This is the bone of the upper arm,” he said in a lecturer’s tone. “Come along on over to the window here. I want to show you something.” He held the bone to the light. Close to one knobbed end, I made out a thin line filled and surrounded by deposits of calcium.
