Located deep inside the jungle, the Black Rock is a sail ship from the mid-1800s. In "The Constant", it is explained that the Black Rock set sail from Portsmouth, England; March 22, 1845 on a trading mission to the Kingdom of Siam, when she was tragically lost at sea. The only known artifact of this journey is the journal of the ship's First Mate, which was discovered among the artifacts of pirates on Île Sainte-Marie, Madagascar seven years later. The contents of this journal have never been made public nor known to anyone outside the family of the seller Tovard Hanso. This journal is later bought at auction by Charles Widmore.