News of the day was the inspiring motive for 'The Law Forbids,' new Universal-Jewel feature starring Baby Peggy, playing at the Queen's Theatre. For it was the news accounts of 'trial separations' among several notable couples in American society that gave the idea of the story of its author, Bernard McConville. A strong cast, directed by Jess Robbins, supports the diminutive star, who is the central figure, including Robert Ellis, Elinor Fair, Winifred Bryson, Joseph Dowling, Hayden Stevenson, William Welsh and William E. Lawrence.