NEW CASTLE is a tiny island town, just one square mile, with a far-reaching history. Once the provincial heart of New Hampshire, its forts stood sentinel over the Piscataqua River for three centuries. Part sleepy scenic village, part trendy tourist resort, it is best known for a famous peace treaty, a rock-throwing devil, and the first shots of the American Revolution, when Paul Revere sparked the gunpower raid at Fort William and Mary. Others point to the treaty deligates, who, while staying at Wentworth by the Sea hotel, ended the bloody Russo-Japanese War in 1905."Great Island" has been home to fishermen and farmers, painters and poets, soldiers and sailors, millionaires, and just plain folk. Here are their stories.