Prologue: In which Albus Dumbledore makes a mistake.
Albus Dumbledore was many things: cunning, intelligent, ambitious, brave, honest, and of course, the headmaster of Hogwarts. He was not, in the opinion of most of those in the know, a fool. Unfortunately, those who claimed to be in the know are often wrong, and even the great Albus Dumbledore would occasionally point out just how foolish he was. Not often enough, though. He had ended up being chased all over the world by the goblins of Gringotts bank, along with their assorted curse breakers, for subverting and circumventing the will of Lily and James Potter. They chased him for almost 4 years before he finally made a blunder massive enough that they managed to corner him. You see, Dumbledore thought that he had hidden himself so well that no one could find him. He was wrong. He was cornered now, with no way out. He gave a long, world-weary, bone-tired sigh.
"Alright, you have caught me. What is it that you wish of me?" Dumbledore was calculating. He already knew what they wanted, but he wasn't going to give it over without trying just a bit of subterfuge first.
"You know exactly what we want, Dumbledore." The goblin in front of him was wearing a mask that only showed his eyes. "Give us the young Potter's location or we will be forced to extreme measures. We called on each family on the list of caretakers for the boy. None of them had him." He glared at Dumbledore.
Dumbledore sighed again. "You cannot take him from that place. If you do, Lily's protections will-"
"You mean your protections." The goblin sneered at Dumbledore. "You used necromancy to power those wards. Because James's death wasn't used for anything else, you used the dispersing energy from it, which you took the time to go and collect, to exponentially increase the power you could wield for a short time to create those protections. You should have known that we'd be well aware when magic like that was used, even if we didn't ever find where. Now, tell me where the boy is." The goblin was quite enraged at this point.
Dumbledore was actually rather surprised, though he declined to show it, as he'd had no idea that they possessed something which could detect that kind of magic. "Number four Privet Drive, in Little Whinging, Surrey…"
The goblin nodded and walked out, talking to somebody outside, presumably a curse breaker, then the two apparated away.