Multiple sources have said the granny could have placed the announcements. Just walk into the newspaper ads dept. and place a birth announcement. Even people who worked in newspapers back in that time period confirmed this is all it would have taken.
Plus some Freepers—definitely not me—have compared the overall announcements in both papers, and found out that neither is a complete list, nor do they match each other. So much for the idea that only HI officials could have placed the ads.
After reading D’Souzas book, I am convinced there is massive amounts of info still out there for us to discover.