The Lion and the Mouse is a lost[1] 1919 American silent drama film produced and released by the Vitagraph Company of America.

[2][3][4] Previously filmed in 1914, the story was later remade at the dawn of sound in 1928 by Vitagraph's purchaser Warner Brothers as The Lion and the Mouse with Lionel Barrymore.

As described in a film magazine,[5] 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 judge's daughter, learns of her father's trouble and returns from Paris, where she has won success as an author.

Determined to force the millionaire's hand, she publishes The American Octopus under a pseudonym with a main character based upon Burkett.