By now the snobography of Auchincloss' old world-small world is very predictable; it extends from Wall Street to Park Avenue, the Colony to the Union Club. And you'll recognize a good many of the people in these stories, or rather vignettes, which are told in the tone of discreet confidences or latterday revelations--they're the familiars who have been populating the Auchincloss annals of belongingness. Here the stories are grouped in three sections: auctioneer Jordan who collects collectors via the items which fall in his hands; the members of a corporation law firm who inform on each other; and a less unified miscellany of four closing pieces, one a playlet.... For older readers they will be reassuring--certainly nothing ever changes here; but when does blue blood become tired, or ""declasse"" demode?