chunk: Meanwhile, Lady Dedlock is also a beneficiary under one of the wills. Early in the book, while listening to the reading of an affidavit by the family solicitor Mr. Tulkinghorn, she recognises the handwriting on the copy. The sight affects her so much she almost faints, which Tulkinghorn notices and investigates. He traces the copyist, a pauper known only as "Nemo," in London. Nemo has recently died, and the only person to identify him is a street-sweeper, a poor homeless boy named Jo, who lives in Tom-All-Alone's.
  Lady Dedlock is also investigating, disguised as her maid, Hortense. She pays Jo to take her to Nemo's grave. Meanwhile, Tulkinghorn is concerned Lady Dedlock's secret could threaten the interests of Sir Leicester, and watches her constantly, even enlisting her maid to spy on her. He also enlists Inspector Bucket to run Jo out of town, so that there are no loose ends that might connect Nemo to the Dedlocks.