Book,  Chapter

1      I,  IV| crusaders in Asia, that he might exercise that ambition against Mohammed,
2    III,  VI|         the age required for the exercise of that office, neither
3      V,  IV|          he sees the Florentines exercise toward you, he has resolved
4   VIII,  IV|          those merit freedom who exercise themselves in good works
5   VIII,  V |         wished his son-in-law to exercise the government and not Lodovico;