As I walked home one freezing day, I stumbled on a wallet someone had lost in the street. I picked it up and looked inside to find some identification soI could call the owner. But the wallet contained only three dollars and acrumpled letter that looked as if it had been in there for years.The envelope was worn and the only thing that was legible on it was thereturn address. I started to open the letter, hoping to find some clue. ThenI saw...
