She might see him from the window, and come to him. I do not say that he thought that it would be so. I fancy that he never thought at all about that or about anything. If you lie under a tree, and open your mouth, a plum may fall into it. 
He stood there with an undefined feeling that she might see him from the window, and come to him; in the way that if you lie under a tree long enough, a plum may drop into your mouth. 