The last page of the manuscript received by Poe appears to have been a photocopy. Rampo seems to know why, but there are still more mysteries surrounding the death of the author.
That must have occurred after 
the manuscript was completed.
.لا بدّ أنّ ذلك حدث بعد انتهاء كتابة السّيناريو
Sie kamen erst nach
Fertigstellung hinzu.
Quindi è successo una volta completato il manoscritto.
Isso foi depois do
término do manuscrito.
значит, роман был дописан.