FRUSTRATION

"So," said Harry, pacing around the common room with a book full of carefully printed notes. "Regulus Black died in 1988, according to the Black family tree, so it's likely he stole the locket that same year. But his body was never found, so he may have died with it on his person. Sirius said he was killed by Death Eaters, so if he did die with the locket, chances are the Death Eaters have it. Or he may have hidden it somewhere. I know Grimmauld Place is unlikely, and it's probably already been searched a thousand times, but I think we should still check there, as it's the only idea we have … "

He trailed off, glancing over at where Ron and Hermione were curled in an armchair together. Hermione was idly playing with Ron's hair and he was stroking her cheek. Neither of them were looking at Harry.

"Are you two even listening?" Harry demanded indignantly. When neither of them replied he threw the book of notes down and stormed off up the stairs to the dormitories. "I'm going to bed!" he shouted from the top of the stairs.

His two friends showed absolutely no indication of having noticed his departure.