He grinned, glad to see that I was fascinated. Well, you definitely know when you ve lost yours. They re invisible, anyway. But you can sense one s presence. He looked at me for a while, and added, I can sense their presence, at any rate.
Trouble is, they tend to drift and wander.
They re mostly just kept in jars. He shuffled off to a shelf in the back of the store, grabbing what looked like an empty jar with a label in some other language from a high shelf. It s practical. Keeps them from drifting off, and it s handy to store and classify. See, this one s the mountain climber whose storm I stopped.