Chesapeake requiem

Tangier Island, Virginia, is a community unique on the American landscape. Mapped by John Smith in 1608, settled during the American Revolution, the tiny sliver of mud is home to 470 hardy people who live an isolated and challenging existence, with one foot in the 21st century and another in times long passed. They are separated from their countrymen by the nation's largest estuary, and a twelve-mile boat trip across often tempestuous water--the same water that for generations has made Tangier's fleet of small fishing boats a chief source for the rightly prized Chesapeake Bay blue crab, and…