Not cuddling, certainly not. No matter how it might look to an onlooker - and to an onlooker it might look a lot like cuddling - that wasn't what it was. Arthur was tired, and comfortable, and though he often heard things about Jim and his behaviour and had received one or two warnings in the past about getting too comfortable around him, he did have faith - he trusted that his friend wouldn't hurt him.

Arthur knew his role in Jim's life, more or less. It wasn't one he had set out to occupy, but rather had slipped into over the years, and he was content in it. He saw Moriarty as a friend. What Jim saw him as.. well, that was much more complicated.. but Jim had never really been one for sharing.

"You're welcome," he muttered quietly back, letting out a slow, relaxed sigh and following it up with a soft yawn. He could feel himself ready to drift off, but something was stopping him.