“[He] funneled the proceeds from the sale of his father’s five-story town house on Gramercy Park into Grand Street, a journal conceived in the spirit of high-minded but nonacademic magazines like The Dial and Horizon. … A dandy, boulevardier and self-educated litterateur, Mr. Sonnenberg consulted only his own taste, backing it with substantial paychecks to his writers, some well known and others not.”