"I'm afraid that I can not really tell what happened that night in Godric's Hallow. I shall tell you what I do know," Dumbledore began."I was not the first on the scene, nor the second. Your parents were protected by a charm that limited who knew where they were. Only the secret keeper or one that they had told in person or by written statement, could find the Godric's Hallow cottage that I had rented to them.
"As I was the owner, I had several charms monitoring the cottage, meant to alert me. Alas the charms are only as good as that of the monitor. They reside, still reside, in my office, still melted trinkets to remind me of my failure. I did not find out about the attack until after the Halloween feast."
Harry could tell that telling the story was already beginning to effect the Headmaster. The jolliness that had enthused his teaching had drained from his face, and there was a tone of genuine regret to his voice. Harry felt his own hand closing on Hermione's.
"Hagrid was the first on the scene. He'd promised Lily, your mother, to bring some select sweets from the feast. Lily had a real sweet tooth, and while hiding she could not often satisfy it. When he arrived, the front of your bedroom had already been blown out. I believe he retrieved you from outside the cottage.
"Hagrid had an encounter with Sirius Black, acknowledged to be the secret keeper for he ran off after Peter Pettigrew. When I arrived, I sent him to first take you to be examined by Madam Pomfrey before taking you to your Aunt's as she is your closest surviving relative. Then I set out to examine the scene closely.
"There were some runes carved in the cradle which you had been in, but it is uncertain who made them, and unfortunately the exact order and placement of the runes is uncertain due to the damage. I do know that your mother was the only other person in the room. Your father's body was found at the base of the stairs. Unlike your mother, he was not in a condition for open casket funeral.
"I think it is clear that your mother did something, and it probably involved runes in some fashion, that protected you. What it was, with the evidence obtainable, is a mystery. So, of course, every says they know, as there are very few ways to disprove those theories."