When he came to the seat where the woman had been, David paused, and would have turned back had he not chanced to look out through the window.

He was just in time to catch the quick upturn of a passing face.

It was _her_ face.

She saw him and recognized him; she seemed for a moment to hesitate; her eyes were filled again with that haunting fire; her lips trembled as if about to speak; and then, like a mysterious shadow, she drifted out of his vision into darkness.
For a space he remained in his bent and staring attitude, trying to pierce the gloom into which she had disappeared.

As he drew back from the window, wondering what she must think of him, his eyes fell to the seat where she had been sitting, and he saw that she had left something behind.
It was a very thin package, done up in a bit of newspaper and tied with a red string.