She gasped in pain--or was it fury?--and exerted all of her strength again in a desperate effort to break my grip. And this time luck was on her side. No, call it what it was. Luck may have figured, but most of it was plain blundering stupidity on my part. I was pretty sure I knew what her first, misdirected blow with the knife had done to the man I'd been talking to, and the thought so sickened and unnerved me that my fingers relaxed a little when the knife went clattering, and she took advantage of that to break free. The passengers were crowding me now, pushing, shoving in alarm, and I knew it would be easy enough for her to force her way between them, still exerting all of her strength and get far enough away to be just one of the thirty terrified people when the train roared out into the light again. They'd all look disheveled, on the verge of panic and I wouldn't have a chance of identifying her. How could I have identified her with any certainty, even if she'd been the only one with a guilty stare? I hadn't the least idea what she looked like. I only knew that she wasn't old, was all woman in her lithe softness, the opposite of an Amazon despite her strength. The femininity which had emanated from her--how instantly it can make itself felt, how instinctively overwhelming it can be!--had made me feel like a brute for an instant, even though I'd known it was her life or mine and I would have been quite mad to spare her. There were men I could think of, the opposite of brutes, who would have knocked her unconscious with a blow to the head. To spare a determined killer is potentially suicidal, but I doubted if I could have done that. I was still doubting it an instant later, when the train emerged from the unlighted tunnel and the bright glare of the Underground lamps flooded the aisle, bringing the man she'd stabbed by accident into clear view. I was sure by now that she'd stabbed him by accident in a try for me, but that wasn't going to help him at all. He had flopped over on his back and was lying sprawled out in the middle of the aisle, and his eyes stared up at me, sightless and glazed. There was no blood either on or beside him, but that only meant that he'd been stabbed in the back and there hadn't been time for blood from the wound to stain the edge of his clothes and trickle out from beneath him across the aisle. His face had the pallor of death and his lips were drawn back over the large white teeth I'd noticed when he'd been talking to me. Drawn back in a stiff, unnatural grin and I didn't have to bend down and listen for a heartbeat I knew I wouldn't hear to be completely sure that the words he'd spoken to me would be the last he'd ever speak on Earth.