Yesterday I watched a youtube video about a passenger who survived the Titanic and later wrote about it. He chronicled hearing an explosion vs collision with an iceberg. Some theorize that there was a fire down below, and they reference a large dark spot on the hull, photographed before the ship departed across the Atlantic. Sabotage, perhaps? There were some big players aboard that ship . . .

It was really the Olympic that sank. J P Morgan switched ships.