Fifty years ago on Thanksgiving Day, a group of friends shared a festive meal in a former Episcopal church in Great Barrington, Massachusetts. First constructed in 1829 as St. James Chapel, then enlarged and renamed as Trinity Church in 1866, the white wooden structure, with pointed Gothic windows, steeply pitched roof and tall attached tower displays the Platonic ideal of a New England church, the transcendent anchor of so many Northeastern towns. But its congregation had dwindled over the years. In 1964 it was deconsecrated and sold to Alice and Ray Brock, who put a bedroom in the tower and made it their home.