Keep him INSIDE, Gary! With the cold and the bad things out there, putting him back out would not be the responsible thing to do at all.

If he's been around for a month, his owners must have moved or something. I agree w/ checking with a vet for a microchip, maybe some posters. I wouldn't put an ad in the paper, though. Be sure the posters leave something for the owners to identify him as theirs.

He sounds an absolute LOVE, could you keep him? Is he happy being indoors all the time?

Hi Mikey Flufftail, you sound a right lap cat!