Disclaimer: Everything you can recognize from Harry Potter belongs to J. K. Rowling. :)

Socks

The letter was addressed to Dumbledore.

"We shouldn't read it," Hermione said.

"It might be important," Ron protested.

Harry didn't say a thing. In the end they still opened the envelope. The piece of parchment inside was purple, and had only a couple of lines written on it.

Dear Albus, it read.

Happy Birthday!

Your Father,
Tweeky

"Tweeky?" Hermione raised her brow. "But that sounds like..."

"Dumbledore's father is a house-elf!" Ron exclaimed.

"Don't be ridiculous," she admonished, and they both turned to Harry, who was quiet for a while.

"That explains his love of socks," he finally spoke.