Contacting owner of lost wallet. What is best way.

I was getting on I5 and there was a wallet laying in the onramp. Googled the owners name With a little searching I found an email address and emailed them. Got a response about 30 min later and it turned out that they were about 15 minutes in front of me. They took the next exit and waited for me. He had left it on top of car while getting gas and didn't realize it was missing until his wife got the email.