I would be doubtful too, but her description sounds spot on. Not so much about the Frontline/flea collar thing (Maybe she is one of those super-clean people who freak at the mention of fleas, and did both Frontline and a collar. Can Frontline be washed off in the rain? That might be another reason for the fleas) but all the other calls you have been getting. Did any of the other calls give as good of a description?

If she doesn't stop by, I would call her and ask if she is absolutely, positively sure that it is her cat Merle because you have been getting other calls and want to make sure the cat is with her rightful owners. If it isn't really her cat, or she has doubts, she might be willing to give her back to you. Then you could screen the other callers and make sure they aren't the real owners.

I want to add, Hanna is my baby, she follows me everywhere, sleeps with me, and even sits on the toity when I'm taking a shower. She comes when I call her *under normal circumstances*. But after the drain uncloggers came (my story I posted here from a week or two ago), I couldn't get her out from under my computer desk for love or money. She was very scared, and wouldn't come to me at all. She normally trusts me totally, so I can't explain that.