Dr. David Livesey, a doctor and magistrate in southwest England, signals his status through his ever-present white wig. His background includes military service and a wound sustained at the Battle of Fontenoy. Livesey first appears treating Jim Hawkins' father at the Admiral Benbow Inn, maintaining composure when threatened by the pirate Billy Bones. After Bones' death and the discovery of a treasure map, he allies with Squire Trelawney to organize a voyage, insisting on secrecy in crew selection. When Jim Hawkins reveals a pirate conspiracy during the journey, Livesey remains calm, strategizing with the captain and squire to escape to the island. He assumes command during conflicts, leveraging his combat experience to defend their position. His tactical decisions include negotiating a truce with Long John Silver and deliberately surrendering the treasure map once learning the marooned Ben Gunn had already relocated the hoard. Livesey secures Gunn's aid by offering cheese, satisfying Gunn's craving for varied food after years alone. Adhering strictly to medical ethics, Livesey provides care to wounded pirates despite hostilities. He participates in the final confrontation at the treasure site, aiding in the rescue of Jim Hawkins and Silver. In adaptations, Livesey consistently displays cheerfulness and frequent smiling, even during combat and interactions; a notable scene shows him grinning while warning Billy Bones about alcohol abuse. His movements exude confidence, featuring a distinctive, striding gait. These specific traits – his laughter and walking style – gained cultural recognition and circulated online. Livesey's role emphasizes rational problem-solving and authority, contrasting more impulsive characters. His actions critically influence the treasure hunt's outcome, though emotional connections with younger figures remain limited. Adaptations preserve his core intelligence and capability while adding specific behavioral details absent in the original source material.