        He had almost given up all hope of finding anything.  Whatever means they had used to get here had removed all evidence of their presence except their footprints, and he would have expected nothing less.  But then, nestled down in the sand between two small craters, he found something.  It nearly escaped his eye, it was so fine.  He oh so gently reached out a finger, and hooked it, pulling it forth from its sandy prison a millimeter at a time, hardly daring to breath.  It was the finest gossamer, shifting colors in front of his awed eyes.  It was a single hair from the pearl winged unicorn.