'Trees aren't messy.' Una rose on her elbow. 'And what about firewood? I don't like coal.'
'Eh? You lie a piece more uphill and you'll lie more natural,' said Mr Dudeney, with his provoking deaf smile. 'Now press your face down and smell to the turf. That's Southdown thyme which makes our Southdown mutton beyond compare, and, my mother told me, 'twill cure anything except broken necks, or hearts. I forget which.'
They sniffed, and somehow forgot to lift their cheeks from the soft thymy cushions.
This is from "Rewards and Fairies" "The Knife and Naked Chalk Hill" http://pinkmonkey.com/dl/library1/digi300.pdf
I can't understand the meaning below "You lie a piece more uphill and you'll lie more natural,' "
Does it mean that she lies unnaturally?
I am glad if some one kindly teach me.