Exit Stage Left

Earlier tonight I was sitting in my chair under the window in the living room and I heard a cat meowing. It was a whiny meow, like Linus usually does, but it sounded like it was far away. I got up thinking Linus was just trying to get my attention from the other room and I turned around to see a kitten sitting in the window outside. It was pretty little, so I went outside to check on it. She was a little skittish at first, but then came right up to me and let me pick her up. I brought her some food and water, which she wolfed down in no time flat, which makes me think that she hasn't been home in quite a long time, but she doesn't seem like she's an alley cat, either, I think she really does have a home, but how do I find her owners? I posted an ad on Craigslist, but beyond that I'm not really sure. She has been in my yard for several hours now and she won't leave, unless it's to sleep underneath my car (which makes me nervous), so I think she'll be here for awhile.

I'm guessing she's about 12-14 weeks old and she's awfully cute: a grey and brown tabby with white feet. She has emerald green eyes and is very friendly, but also scared. She loves to be picked up and petted. I've named her "Spook" for now, which seems fitting and I wish I could keep her! Unfortunately, Linus is already mad at me, he won't let me pet him, even, without first hissing his disapproval. And there's simply no way I can have another cat. You know what they say, "two's company..."