The answer to the question: What does the butler's ex wife ask The Lone Wolf to do? is inside the article: In 1947, Inspector Garvey of Scotland Yard suspects Michael Lanyard, the reformed jewel thief known as "The Lone Wolf" is behind the theft of the priceless diamonds called the "Eyes of the Nile". Lanyard denies any involvement claiming that he is in London with his butler, Claudius Jamison to write a book on the jewels and was in New York when they were stolen.  Lanyard and Jamison are short of funds and when Ann Kelmscott, the daughter of wealthy gem collector Sir John Kelmscott, invites them to the family estate, they agree. Sir John confides that he is in desperate need of money and asks Lanyard to arrange a confidential loan with part of his jewel collection as collateral. Jamison tells his master that Lily  (Queenie Leonard), the maid, told him the butler, Henry Robards, is heartbroken because his former wife, actress Iris Chatham, has run off with Monty Beresford who financed the lavish stage production that launched Iris to stardom.  Back at his hotel, Lanyard receives a call from Iris, inviting him to the theater that night where she asks him to stay away from the Kelmscotts. At her apartment, Robards begs her for a reconciliation, but she demands something first. Lanyard decides to accept Kelmscott's offer and arranges to meet Bruce Tang, a gem dealer the next morning. Kelmscott gives Robards a packet of jewels to deliver to Lanyard but he steals the Eyes of the Nile for Iris. David Woolerton, Ann's fiancé, asks him for a ride because he wants to spy on Lanyard. At Tang's shop, Inspector Garvey has followed Lanyard. When Robards' car rolls to a stop, the butler is dead behind the wheel, the jewels still in his possession but the Eyes of the Nile are gone. Woolerton claims Robards pushed him out of the car on the outskirts, and said he suspects Lanyard was the murderer., can you guess it ?
stay away from the Kelmscotts