similar thing happened to me...had about 3k in the wallet..found the guy and not even a thank you.
a thank you would have been nice.
Yeah, I was skin diving near a pier when I was 15. A guy on the pier yelled to me and my friends that he dropped his wallet. He said he would give us a reward if we found it. I was looking around and found it . It was packed with cash . I could have stuck it in my shorts and said we can't find it but I did the right thing . They lowered the net , he raised it up and walked away