# XLII explained — The Mysterious Island > Chapter companion for The Mysterious Island by Jules Verne. ## What happens The colonists return from their coastal exploration, and Cyrus Smith gathers everyone to discuss a series of mysterious events that have occurred on Lincoln Island, including the unexplained light seen above Granite House. They resolve to thoroughly search the island in spring. The winter passes with storms and repairs, and in late October, Herbert discovers a mysterious speck on a photographic plate. ## Themes in this chapter ### Mystery and the Unknown The colonists confront a series of inexplicable events, culminating in the decision to search the island for a hidden benefactor. ### Community and Cooperation The group discusses the mysteries together and plans a collective search, demonstrating their unity. ### Isolation and Longing for Home The winter storms and constant repairs emphasize the colonists' isolation and the harshness of their environment. ## Character check-ins ### Pencroff Sails the Good Luck, discusses the mysterious light, and becomes moody upon realizing the island may have another inhabitant. ### Cyrus Smith Leads the discussion of inexplicable events, denies lighting any fire, and proposes a thorough search of the island. ### Herbert Brown Confirms seeing the light, takes a photograph of Union Bay, and discovers a mysterious speck on the negative. ### Gideon Spilett Confirms the light's brightness and urges Smith to inform the others about the strange occurrences. ### Neb Expresses unease in Shark Gulf and discusses the mysteries with Pencroff. ### Ayrton Returns to Granite House for winter, remains humble and sad, and later repairs the corral. ### Jup Welcomes the colonists upon their return and is noted for his behavior near the well. ### Top Mentioned for his singular actions near the well, but shows no anxiety during winter. ## Key lines > Are you sure you saw it, Spilett? asked Smith, for the twentieth time. Was it not a partial eruption of the volcano, or some meteor? No, Cyrus, it was certainly a fire lit by the hand of man. Smith repeatedly asks Spilett if the light could be a natural phenomenon, but Spilett insists it was a man-made fire. _Highlights the central mystery of the chapter._ > Very well, my friends, replied Smith, during all that night neither Neb nor I lit any fire at all! You did not!— cried Pencroff, so overcome with astonishment that he could not finish the sentence. Smith reveals that no one in Granite House lit the fire seen by the others, shocking Pencroff. _Confirms the existence of an unknown agent on the island._ > It is a defect in the glass, he thought. And then he was seized Herbert initially dismisses the speck on the photograph as a flaw, but becomes alarmed. _Foreshadows a new mysterious event._ ## Links - HTML: https://www.betterreads.online/discover/the_mysterious_island_se/chapters/xlii - Book: https://www.betterreads.online/discover/the_mysterious_island_se - All chapters: https://www.betterreads.online/discover/the_mysterious_island_se/chapters