A STUDY IN SCARLET Part One Chapter 1 Mr.Sherlock Holmes Chapter 2 The Science of Deduction Chapter 3 The Lauriston Garden Mystery Chapter 4 What John Rance Had to Tell Chapter 5 Our Advertisement Brings a Visitor Chapter 6 Tobias Gregson Shows What He Dan Do Chapter 7 Light in the Darkness Part Two Chapter 1 On the Great Alkali Plain Chapter 2 The Flower of Utah Chapter 3 John Ferrier Talks with the Propher Chapter 4 A Flight for Life Chapter 5 The Avenging Angels Chapter 6 A Continuation of the Reminiscences of John Watson,M.D. Chapter 7 The Conclusion THE SIGN OF FOUR Chapter 1 The Science of Deduction Chapter 2 The Statement of the Case Chapter 3 In Quest of a Solution Chapter 4 The Story of the Bald-Headed Man Chapter 5 The Tragedy of Pondicherry Lodge Chapter 6 Sherlock Holmes Gives a Demonstration Chapter 7 The Episode of the Barred Chapter 8 The Baker Street Irregulars Chapter 9 A Berak in the Chain Chapter 10 The End of the Islander Chapter 11 The Great Agra Treasure Chapter 12 The Strange Story of Jonathan Small