One of this island's dependencies is Inaccessible Island, which has a noted flightless bird, and Gough Island serves as a source of Guano for inhabitants of this island.
A valley called Joey's Garden on this island leads to Ridge-Where-the-Goat-Jumps-Off while East and West Jew's Point commemorate the recovery of a Jew rescued from a ship. One of this island's dependencies is Inaccessible Island, which has a noted flightless bird, and Gough Island serves as a source of Guano for inhabitants of this island. A massive fire in early 2008 destroyed this island's power generators and fishing factory and an unexpected cinder cone eruption in 1961 destroyed parts of the major settlement, Edinburgh of the Seven Seas. For 20 points, identify this small island in the South Atlantic Ocean, a dependency of St. Helena. 
A valley called Joey's Garden on this island leads to Ridge-Where-the-Goat-Jumps-Off while East and West Jew's Point commemorate the recovery of a Jew rescued from a ship.
Tristan da Cunha