When Locke needs dynamite to blow open the hatch, The French Woman, Danielle Rousseau, leads them to the Black Rock, which turns out to be an old, land-locked slave ship (Ep: 1x23, Exodus Part 1).
In 1996, Desmond goes to find Charles Widmore. Charles is at an auction. The auctioneer says, "The Black Rock set sail from Portsmith, England March 22, 1845 on a trading mission when she was tragically lost at sea. The only known artifact of this journey is the journal of the ship's first mate, discovered among the artifacts of pirates seven years later. The contents of this journal have never been made public nor are known to anyone outside the family of the seller, Tovard Hanso. We open the bidding on lot 2342 at 150,000 pounds." Charles continues to bid until he wins the journal for 380,000 pounds (Ep: 4x5, The Constant).
