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