Dear Mother, and to a lesser extent Father, Many things in the world have not been named; and many things, even if they have been named, have never been described. One of these is the sensibility -- unmistakably modern, a variant of sophistication but hardly identical with it -- that goes by the name of Camp Kenwood at Winnipesaukee‎. To snare a sensibility in words, especially one that is alive and powerful and swarming with…