On an ""exultant"" summer day recently widowed Hester Carr steps out into the ""richly scented sunshine"" to go to the hairdresser. And to buy a dog, a cocker spaniel, Flushie, since there is a disconcerting new man in town, not as dangerous as rumored. Actually he's a professor and he's interested in bringing culture -- via a Fife and Drum Corps and a recital -- to the young and of course he is interested in Hester. She's only 36 even if she wears a brocade gown with cap sleeves. . . . Mrs. Turnbull, unlike her contemporary Faith Baldwin, closes her eyes to the modern world so that her elegant low fashion and genteel speechways are anachronistic except to that loyal readership to whom she brings ""solace and joy."" But Indian summer gets later every year.