He probably tried it in his turn, fell into the torture-chamber and only left it hanged.

I can well imagine Erik dragging the body, in order to get rid of it, to the scene from the Roi de Lahore, and hanging it there as an example, or to increase the superstitious terror that was to help him in guarding the approaches to his lair! Then, upon reflection, Erik went back to fetch the Punjab lasso, which is very curiously made out of catgut, and which might have set an examining magistrate thinking.

This explains the disappearance of the rope.
And now I discovered the lasso, at our feet, in the torture-chamber! ...

I am no coward, but a cold sweat covered my forehead as I moved the little red disk of my lantern over the walls.
M.de Chagny noticed it and asked: "What is the matter, sir ?" I made him a violent sign to be silent.
[1] An official report from Tonkin, received in Paris at the end of July, 1909, relates how the famous pirate chief De Tham was tracked, together with his men, by our soldiers; and how all of them succeeded in escaping, thanks to this trick of the reeds.
[2] DAROGA is Persian for chief of police.
[3] The Persian might easily have admitted that Erik's fate also interested himself, for he was well aware that, if the government of Teheran had learned that Erik was still alive, it would have been all up with the modest pension of the erstwhile daroga.

It is only fair, however, to add that the Persian had a noble and generous heart; and I do not doubt for a moment that the catastrophes which he feared for others greatly occupied his mind.