How many ways can Georgina Chapman and Keren Craig spin their evening fairy tale? For fall, they delved into the world of Charles Dickens’ “Great Expectations,” specifically the decaying beauty of Miss Havisham, who acted as muse to at least one other collection this week. She was a good choice for the designers, whose decadent creations thrived within the context of that story line. It was a work of melancholy beauty. The silhouette was steeped in dark Victorian romance with sliver-thin mermaid dresses cut from the finest tulle, often done with jagged, unfinished hems. Chapman and Craig outdid themselves with the embroideries, elaborate 3-D laces that curled up the bodice and the shoulders on gowns long and short. Some looks were topped with overflowing tulle veils for a sense of drama that was heightened by the graphic contrast between black tulle and white lace or nude and red.