Kanami and the others arrive at Mokusa's headquarters and meet with Origami Yukari's younger sister, Akane. The girls learn the truth of the Great Disaster of Sagami Bay that occurred 20 years ago from her and Friedman. The truth of that day is vastly different from what the young Toji have been taught in school.
I was able to locate it 
with clues from old books.
.تمكنت من تحديدها بأدلّة من كتب قديمة
Durch Hinweise aus alten Büchern
verstand ich es letztlich.
Pude encontrar pistas
en libros antiguos.
Pude encontrar pistas
en libros antiguos.
J’ai pu en découvrir la nature
grâce à de vieux documents.
Fui in grado di trovarla grazie 
ad alcuni indizi trovati negli antichi libri.
Fui capaz de descobrir algumas
pistas em velhos manuscritos.
Вот что я выяснила,
 пролистав древние книги.