The Green Man raised his arms twice, making signs which I did not understand; then, leaving the window, he again took up his package and moved along the gallery towards the landing-place.
Rouletabille had instructed me to undo the curtain-cord when I saw anything.

Was Rouletabille expecting this?
It was not my business to question.

All I had to do was obey instructions.

I unfastened the window-cord; my heart beating the while as if it would burst.

The man reached the landing-place, but, to my utter surprise--I had expected to see him continue to pass along the gallery--I saw him descend the stairs leading to the vestibule.
What was I to do?
I looked stupidly at the heavy curtain which had shut the light from the window.