I would definitely put up "found cat" notices in the neighborhood. Also call all the local veterinarians, animal hospitals and animal control people to see if anyone has reported her missing. Basically contact all the places you would contact had you lost a pet ... but in reverse! You can put a free listing in most local papers - or at least their websites, saying "Found Cat." And there is a website https://www.lostmydoggie.com where you can see if any cats have been reported missing near you (by zip code) and also list her on their site for free. We recently learned of this service when we got a phone call about a cat missing in our area. Sadly, in our case, I suspect the coyotes that live in the conservation area next door, as every spring/summer a few cats seem to go missing, or small dogs too. I do wish people would keep their cats inside around here, as between the traffic and the wildlife, it just is not safe, and a spoiled housecoat is so match for most predators.