Jegulus sending letters back and forth. James charming two pieces of paper so he and Regulus can talk without using copious amounts of paper. Regulus and James having bracelets that can let them feel each other moods. James breaking/throwing away his once he finds out about Regulus's dark mark. James who tears apart his charmed piece of paper. James who wants nothing to do with Regulus. Regulus, after Hogwarts, who sends James letters about everything just like when they were younger. Regulus sending James a letter when he first sees Peter at a death eater meeting. Regulus sending one last letter before he goes to the cave. James who saved each one of Regulus's letters and opened some of them the night he heard of Regulus's death. James who didn't open one specific letter warning him about Peter.
