Rampo receives an invitation to a detective game from none other than E. A. Poe. He's indifferent at first, until Poe reveals what the reward would be should he win.
So, I figured, the murderer and 
the author must be in cahoots.
.لذا فقد اكتشفتُ أنّ القاتل والكاتب لا بدّ أنهما متواطئان
Dadurch ist mir aufgefallen, …
Ahí me di cuenta.
Ahí me di cuenta.
C’est là que j’ai compris
Quindi ho pensato che l'assassino
e l'autore fossero in combutta.
Aí veio a epifania: o assassino 
e o autor estão mancomunados.
И я догадался... что убийца
и автор, скорее всего, в сговоре.