The beginnings of Tom Sawyer and Huck Finn...

"Now, we'll start this band of robbers and call it Tom Sawyer's Gang. Everybody that wants to join has got to take an oath, and write his name in blood."  (Mark Twain, "The Adventures of Huckleberry Finn", 1884).

"The trouble is not in dying for a friend, but finding a friend that is worth dying for" (Mark Twain).