Which sentence in this excerpt from The Time Machine by H. G. Wells indicates that the narrator has little hope for the Time Traveller’s return?
I felt an unreasonable amazement. I knew that something strange had happened, and for the moment could not distinguish what the strange thing might be. As I stood staring, the door into the garden opened, and the man-servant appeared.

We looked at each other. Then ideas began to come. "Has Mr. —— gone out that way? " said I.

"No, sir. No one has come out this way. I was expecting to find him here."

At that I understood. At the risk of disappointing Richardson I stayed on, waiting for the Time Traveller; waiting for the second, perhaps still stranger story, and the specimens and photographs he would bring with him. But I am beginning now to fear that I must wait a lifetime. The Time Traveller vanished three years ago. And, as everybody knows now, he has never returned.