The Lion and the Mouse is a lost 1919 American silent drama film produced and released by the Vitagraph Company of America. It was directed by Tom Terriss and based on the famous Charles Klein play. Alice Joyce starred in the film.
As described in a film magazine, John Burkett Ryder Randolf, the richest man in the world, seeks to discredit a judicial decision which works against his financial interests by discrediting its author, Judge Rossmore Hallam, and has impeachment charges initiated against the judge in Congress. Shirley Rossmore Joyce, the judges daughter, learns of her fathers trouble and returns from Paris, where she has won success as an author. She is loved by Jefferson Ryder Nagel, son of the magnet. Determined to force the millionaires hand, she publishes The American Octopus under a pseudonym with a main character based upon Burkett. He is attracted by the book and brings its author Shirley, whom he knows as Sarah Green, into his home to write his biography. She uses this opportunity as the chance to obtain two letters that will clear her fathers name. John aids her in obtaining the documents, but is discovered and denounced as a thief. Shirley cannot allow the man she loves so branded, so she reveals her identity. The millionaire lion had already been won over by the charm of the mouse, so there is a happy resolution.
Source: Wikipedia