 Why does no one on town know who Haron Gorka is?
She had been known to say that there are over a billion men in the world, a goodly percentage of whom are eligible bachelors, and that the right one would come along simply because she had been waiting for him. The name—Haron Gorka: its oddness was somehow beautiful to Matilda. Haron Gorka—the nationality could be anything. "I said, where can I find Haron Gorka?" First place, I don't know any Haron Gorka—" Matilda kept the alarm from creeping into her voice. Matilda did, only they didn't know any Haron Gorka, either. As far us the gentry of Cedar Falls was concerned, Haron Gorka did not exist. If she could not find Haron Gorka, that was one thing; but she knew that she'd rather not return home and face the widow Penshaws, at least not for a while yet. Certainly a man as well-educated as Haron Gorka would be an avid reader, and unless he had a permanent residence here in Cedar Palls, one couldn't expect that he'd have his own library with him. This being the case, a third-rate collection of books was far better than no collection at all, and perhaps the librarian would know Mr. Haron Gorka. "I'm looking for—" "Haron Gorka." I never did trust this Mr. Gorka...."
 He’s not a real resident, but an interstellar visitor.
 Haron Gorka isn’t his real name. Thus, there’s no records of him.  He’s not a real resident. He’s using a fake name while he stays in town.  He travels so much that the people in town haven’t gotten to know him.  He’s not a real resident, but an interstellar visitor.