On a trip to the Middle East several years ago, a close friend and his wife determined to save money by collecting rocks instead of purchasing souvenirs. At every significant location in Italy, Egypt, Israel, and Greece they picked up stones and labeled them with a date and a location. They were stored in an elderly suitcase brought along for just that purpose. The bag was the provocation for considerable humor during the three weeks of our trip. It grew increasingly ponderous as the days passed. The memorial stones seemed to grow correspondingly smaller.