A Study in Scarlet Book 1 Chapter 4 - What John Rance Had to Tell

In which Holmes conducts a meticulous on-site investigation at the scene of the mystery, applying his keen powers of observation to deduce numerous intricate details about the suspects and their movements. He then interviews a sleepy constable whose unwitting encounter with a key figure offers a crucial, if overlooked, clue that promises to further illuminate the baffling case.