Jack didn't give his vortex manipulator up easily. He didn't give it up at all. The only people who'd ever worked on it had been him and the Doctor. He knew that, the Doctor didn't.

He hesitated at first though. As much as he knew he was comfortable to share like that before, he couldn't allow himself to treat that as normality now. And it wasn't. After all he still had that whole other set of memories.

"I--" he unbuckled it and handed it over, "look after it. It's all I've got." And that was far too honest too. But it was. Everyone was dead or gone, and something that in his mind seemed like it could be beautiful... that wasn't real.

"Well," he said, attempting to sound light. "Never said, did I... good to meet you, Doctor. Thanks for having me on--" but that was something. "Wait-- does the TARDIS remember me?"

That would be something.