It was said that in order to host a book party last night, the painter Gray Foy had to remove approximately 700 objets from the sprawling apartment on the sixth floor of the Osborne, on West 57th Street, that he had shared for 27 years with the longtime Condé Nast writer and editor Leo Lerman, who died in 1994. Yet every conceivable surface—tables, shelves, walls—was covered with trinkets and statuettes, photographs and paintings and drawings, candelabras and candlesticks, miniature fake pastries arranged around a samovar, Tiffany lamps, framed butterflies and other insects, books, "good Russian silverware," gnomes, decorative boxes, and in one of the three bedrooms, a now-empty hornet's nest, hanging delicately on the corner of a large mirror.