He's studying her rather closely - intently - in assurance that she wouldn't be trying to trick him, although, she still could. "And what do you plan to use these measurements for?"

He was always the serious one, always calculating. Life circumstances tended to make him do that now. It wasn't a choice, he had to, not after the deaths of his family and his father...

It was rude to stare, and he looks away after her demonstration. So far, she had been very kind and full of information since he had been here. "Where are you from, Martha?" He'd rather attempt to change to subject.