They were the two most important Anglophone novelists at that time, American the first, Scottish the second. Mark Twain was called the Lincoln of Literature and Robert Louis Stevenson sold millions of books of his “Treasure Island”. They met each other in New York in 1888, just before Robert Louis Stevenson definitively decided to travel to the South Seas, a meeting that might have influenced this choice. But about this “association”, as this friendship was called, there is not much evidence of it. Why?