Part I: Shipwrecked in the Air
Engineer and leader of the escape; swept away by a wave after the balloon crash.
The Hurricane of 1865
One of the five passengers; his voice is heard giving commands during the crisis.
II
Federal engineer and leader of the escape; a man of action, science, and courage, wounded and captured at Richmond.
III
Swept away by a wave and missing; his companions search for him throughout the night.
IV
Missing; Herbert expresses hope that Smith survived the disaster.
Arranging the Chimneys
Absent and presumed lost at sea; his disappearance dominates the thoughts and emotions of the other castaways.
The Castaways' Inventory
Mentioned as missing and presumed dead; his practical science is sorely missed by the castaways.
VIII
The engineer, found alive but weak, gradually regains consciousness and strength. He reflects on the mystery of his rescue and the footprints.
IX
Recovered from his lethargy, he assesses their situation and plans to climb the mountain to determine if they are on an island or continent.
The Ascent of the Volcano
Leads the expedition, invents a lens to start a fire, and deduces they are on an island from the summit.
Chapter XI: At the Summit of the Cone
Leads the expedition to the summit, estimates the island's size, proposes naming the island Lincoln Island, and addresses the group about their situation.
Exploration of Lake Grant
Sets his watch to Richmond time for future use; collects mineral samples; proposes exploring Lake Grant; plans to utilize waterpower.
XIII
Leads the colonists in making tools and pottery; discovers mugwort for tinder; conducts astronomical observation.
XIV
Leads the measurement of the granite wall using geometry, calculates the latitude, and plans the longitude observation.
XV
Directs the metallurgic operations, plans the seal hunt for bellows, and oversees the iron and steel production.
XVI
Leads the discussion on finding a better habitation and the exploration of the lake's outlet; expresses concern about pirates and dangerous animals.
XVII
Engineer who theorizes a cavity in the granite, manufactures nitroglycerine, and leads the blasting plan.
XVIII
Leads the exploration, devises the nitroglycerine blast, and names the new home 'Granite House.'
XIX
Leads the construction of Granite House, plans the rope ladder and interior divisions, and takes precautions against potential threats.
XX
Engineer who calculates the potential harvest from a single grain of corn and leads the candle-making process.
Chapter XXI
Leads the exploration and presents his theories on continental subsidence, coral island formation, and the future cooling of the Earth.
XXII
Works with Spilett to clear the Chimneys, undertakes sugar crystallization from maple trees, and is grateful for Granite House's shelter.
Part II: The Abandoned
Leads the colonists in engineering and strategic decisions.
XXIII
Analyzes the bullet incident and concludes a gun was fired within three months; suggests the turtle escaped due to the rising tide.
Trial of the Canoe
Advises against breaking the box, suggesting to tow it whole to Granite House; reads the Bible verse at Herbert's request.
XXV
Leads the exploration, remains absorbed in thought, and uses the pocket compass to navigate.
XXVI
Leads the expedition, uses compass to navigate, and deduces the creek's course to the sea.
XXVII
Leads the exploration and deduces that a ship must have touched the island but left no trace.
XXVIII
Calm and patient, he devises the plan to enter via the weir and decides to spare and domesticate the orangutan.
Projects and Progress on Lincoln Island
Leads the planning and execution of major projects, including the bridge, corral, and isolation of Prospect Plateau.
Clothing, Corral, and Cultivation
Engineer who oversees the construction of the corral, manufactures pyroxyline, and directs the colonists' daily work.
Bad Weather and New Discoveries
Builds a hydraulic elevator, establishes a glassworks, and makes precise observations to determine the island's coordinates, discovering Tabor Island on the map.
Ship building
Designs the boat, calculates the corn harvest, and invents whalebone traps for winter.
Winter Preparations and the Albatross Message
Leads wool processing and fulling mill construction; disapproves of Pencroff's voyage; investigates the well.
XXXIV
Directs the defense against the foxes, analyzes the situation, and later examines the bottle message, advising caution about a voyage to Tabor Island.
XXXV
Remains at Granite House but authorizes the rescue mission and analyzes the message in the bottle.
XXXVI
Mentioned as the one who lit the guiding light on Lincoln Island.
XXXVII
Leads the effort to rehabilitate the Unknown, showing deep compassion and insight into the effects of isolation.
A Mystery to Be Solved
Shows compassion and patience, insisting the colonists respect the Unknown's silence and wait for him to speak voluntarily.
XXXIX
Leads the colonists in building a house for Ayrton at the corral, offers him friendship and pardon, and questions him about the mysterious paper.
XL
Proposes and oversees the construction of the electric telegraph; discusses the mystery of the bottle with Spilett; remains determined to uncover the island's secrets.
XLI
Leads the discussion on rescue plans and organizes the coastal exploration.
XLII
Leads the discussion of inexplicable events, denies lighting any fire, and proposes a thorough search of the island.
Part III: The Secret of the Island
Leads the colonists in uncovering the island's secrets and engineering their escape.
XLIII
Leads the group in assessing the ship and planning defense; orders concealment of their presence.
XLIV
Engineer who reluctantly allows Ayrton's dangerous reconnaissance mission and later hints at an unseen ally.
XLV
Devises the defensive plan and directs the colonists from the Chimneys.
XLVI
Leads the investigation of the wreck; remains reserved about the cause of the disaster.
XLVII
Proposes the theory of a mysterious benefactor and advocates for mercy towards the convicts.
XLVIII
Engineer who plans the expedition and decides to investigate Ayrton's silence.
XLIX
Kills a convict with his poniard; assists in treating Herbert and sends Top to Neb.
L
Leads the care for Herbert and strategizes against the convicts; reflects on the colonists' fortunes and the mysterious protector.
LI
Leads the discussion on strategy; decides to transport Herbert back to Granite House after receiving Neb's warning.
LII
Visits the devastated plateau with Neb; cuts willow bark for a febrifuge; is told by Spilett of the dire prognosis.
LIII
Leads the expedition; plans the exploration and organizes the search for Ayrton and the mysterious benefactor.
Exploration of Reptile End
Leads the exploration, insists on caution, and deduces that the convicts likely did not stay at the corral.
LV
Leads the investigation into the convicts' deaths and the search for the mysterious protector.
LVI
Plans the construction of a larger vessel; observes smoke from Mount Franklin on September 7.
LVII
Leads the colonists in investigating the volcano and the mysterious telegraph signal, deducing the hidden cavern and the boat.
Captain Nemo's Revelation
Recognizes Captain Nemo, thanks him for his help, and offers a measured judgment on Nemo's past actions.
The Last Hours of Captain Nemo
Leads the colonists, promises to fulfill Nemo's wishes, and closes the captain's eyes after death.
LX
Engineer; leads exploration of the volcano and Crypt Dakkar; expresses concern about the eruption and accelerates shipbuilding.
LXI
Reveals the island's impending destruction based on Captain Nemo's warning; leads efforts to divert lava and hasten ship completion.
LXII
Remains calm and leads the group; expresses gratitude to Providence and Captain Nemo for their rescue.
