I can tell at a glance the trades of many workingmen I meet on the street.

Look at me.

Why am I rolling all about the shop?
Because of the years I put in on the sea.

If I'd put in the same years cow-punching, with my body young and pliable, I wouldn't be rolling now, but I'd be bow-legged.

And so with that girl.
You noticed that her eyes were what I might call hard.