I've already posted to Craigslist in the lost and found, and I'm about to make fliers to go and put up around where I found they keys.
What else can I do?
How long should I hold on to them before giving them to the police?
For those good Googlers, one of the keys has black plastic on it and says 'BELL', but googling Bell Keys brings up musical instruments, not keys. Is it a key brand name? There is a serial number on it, I was thinking if I found the Bell Key Company, I could try that.