In case you haven't followed the story, Dr. Jim Gray 63, a well known and highly respected Microsoft researcher, left San Francisco Bay on his 40 foot C&C, Tenacious, in unusually calm conditions last Sunday for a day sail. He never returned.According to reports he was a highly skilled sailor and was on a mission out to the Farralone Islands to dump the ashes of his recently deceased mother. The round trip was to have been about 60 miles. His last contact was a cell phone call to his wife just before he was out of range for coverage. The boat was reportedly in very good condition and equipped with a life raft, EPIRB, etc. He also usually wore a harness and tether when singlehandingAn exhaustive Coast Guard and private search have found no clues and no sign of either Gray or Tenacious.The usual explanations don't make a lot of sense. If he fell overboard while peeing, where is the boat? Run over by a freighter? Visibility was good. And why no radio traffic or an EPIRB? Whales are mostly further south this time of year. Did he encounter a problem and is holed up in a cove somewhere? A grief stricken suicide over his mother's death? Did he run away? Kidnapped by Microsoft competition? Perhaps we'll never know.Let's hope he shows up. Meanwhile our thoughts are out to his family.Gary WyngardenS/V Wanderlust h37.5