Here's my short "Internet investigation" story: late at night I found a wallet on the pavement and decided to deliver it myself the following day since the add

Here's my short "Internet investigation" story: late at night I found a wallet on the pavement and decided to deliver it myself the following day since the address on the driver's license was very close to my place. Next day I discover the guy moved. But with some of his info, I found the Google cache of an old Craigslist ad he had posted, that gave me his phone number. He was pretty happy.