This is, as any visitor knows, rather unfair but not entirely off the mark.

But hardly any visitor knows the man behind the lights.

The visitor only knew one thing about me, that I was blind.

Thus far only their other visitor, Clark, knew what that mission was.

Taking their first step into the museum, returning visitors know there has been a big change.

At the same time, a visitor knows full well that it is all about the market.

And I'm not sure that my visitors know about this.

In fact I doubted the visitors knew what she was talking about.

Earlier visitors, a mere two or three centuries ago, knew less of what to expect.

"If the visitors don't know the legend by now, then they ask what it's about."