"(...) the sole surviving manuscript of the Ethics was deposited in the archives of the Roman Inquisition by Steno, who also submitted an indictment of his former friend to the Inquisitors. They did their work well: their subsequent investigation provides one of the main sources for Spinoza’s life. "

https://thecritic.co.uk/issues/august-september-2023/a-brilliant-biography-of-an-elusive-genius/