Original sentence: In exchange for Willougby's life, they demanded 1,300 marks for his release.This they also received, as Willoughby paid 1,300 marks for his freedom
Edited sentence: In exchange for Willougby's life, they demanded the then large sum of 1,300 marks for his release.This they also received, as Willoughby paid the massive sum of 1,300 marks for his freedom