English translation of the medieval German text

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... common good, then he [Gutenberg] should return [this surplus] likewise. And if Johannes Fust proves by oath or honorable witness that he borrowed the aforementioned sum against interest and not from his own assets, then Johann Gutenberg should also pay him this interest according to the terms of their written agreement. Once the above verdict had been read aloud in the presence of the aforementioned Henrich etc., Heinrich and Bechtolff, the servant of the aforementioned Johann Gutenberg, the aforementioned Johann Fust swore, affirmed and vowed with his fingers resting on the Holy [Relics] and in my, the notary public's ...