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Three days after the seventh month died on the modern Gregorian calendar, a small brown owl flew into the lair of the self-styled Dark Lord and delivered a letter to its final destination. It was the end of a very long and circuitous path for the message…one that involved four different owls and three separate dead-drops.

Once the designated minion by Voldemort's side was dismissed, the Dark Lord cast the appropriate counters to the near-lethal privacy spells that guarded the envelope's contents. Inside that envelope was a simple list that had been hastily scribed by an unmarked operative in the early hours of the first day of August. It was more of a table, actually, with the names of newborns that had been born at St. Mungo's over the previous month:

o-o-o-o-o

04 July – Theodore Nott, parents Thaddeus and Heather Nott

12 July – Elizabeth Berger, parents Troy and Gwendolyn Berger

13 July – unnamed boy, parents identity protected by memory charm

16 July – unnamed girl, parents identity protected by memory charm

27 July – Patricia Ashburn, parents Edward and Joyce Ashburn

31 July – Neville Longbottom, parents Frank and Alice Longbottom

o-o-o-o-o

While the Dark Lord's eyes covered the entire page and all six entries, his brain only recognized the existence of five lines of text…such was the strength of the Fidelius charm that now protected the last name on the list...a charm than now protected the following secret:

"Neville Longbottom was born as the seventh month died, to parents who had thrice defied the Dark Lord."

The Fidelius charm's magic didn't physically erase the words and numbers that were written before it was cast (by someone other than the secret keeper)…instead, it acted like an amped-up Notice-Me-Not charm, and kept anyone who looked at those words and numbers from registering their meaning.

"Five births…a couple more than normal," Voldemort mused, as his eyes passed over Neville's name. "But two more anonymous births protected by obliviation...damn Purebloods and their worries about squib offspring and social standing…" The Dark Lord also was well aware of the likelihood that an equal number of expectant mothers had given birth at home, and that their children's names (like Harry Potter's) wouldn't have been recorded at St. Mungo's.

http://www.fanfiction.net/s/5739420/5/