Henry didn't completely understand the explanation about the chronotons, but he definitely did not want any more rips in dimensions. That was plenty to convince him that the measure was justified, even past his own reasons.

He was still really surprised by the high salary. He made about a month's worth of this salary every year- he wasn't even thinking in terms of pounds. Oddly enough, that was what sunk all of this in, to him. The premature death wasn't what phased him, because he already felt like he was living on borrowed time. But the salary was an indication that he was really going to live here, and he'd help save people, and he'd finally be able to afford some nice camera equipment.

He took the leather wrist strap from Jack, fumbled with it for a moment, then managed to strap it on correctly. He looked up at Jack and smiled. Jack will eventually realize that smiles from Henry are very few and far between- he just didn't have a very expressive face. But when he did manage to smile, it went through his whole body, from his relaxed posture to the crinkle of skin around his eyes. "Thank you," he said simply.