Stanley dug up a lipstick bottle that Kate Barlow used to own. He did not know that she used to own it, but the initials on the container (KB) looked very familiar to him.
In Camp Green Lake, if you dig up something that the Warden likes, you get to just relax that rest of the day. X-ray convinces Stanley to give the artifact to him, so he can get a day off.
Hey, look what I found!
You should give that to me because I've been here longer. I deserve a break more than you do.
Do you know the alphabet?
Stanley tries to teach Zero how to read after he found out that Zero couldn't.
A B C...
Mr. Pendanski tells Stanley that he has better luck teaching a shovel to read and write after he found out about the lessons. Zero then, hits Mr. Pendanski with a shovel and runs away from the camp.
A few days passed after Zero ran away, Stanley decides to see if Zero is still alive and tries to find him. Also, he wanted to see the mountain that looks like a big thumb because he knew that's where his great-great grandfather lost his fortune.
Stanley found Zero, and together they found Stanley's great-great grandfather's fortune. Then, Stanley's lawyer went there to get Stanley because she found out that Stanley was actually innocent. Stanley's lawyer took Zero with them because after Zero ran away from camp, the Warden decided to erase his records, so now there is no evidence that Zero committed a crime.