Epistulae VI 20 16-18

1a           Main Clause
2a       Relative Clause Begins (vidēbātur supplied from 2b)
2b       Relative Clause Concludes
1a First Main Clause
1b Second Main Clause (supply erat)
1a First Main Clause
1b Apodosis (in effect a Second Main Clause) Begins (opertī = opertī essēmus)
1c Apodosis (in effect a Second Main Clause) Concludes
1a Apodosis (in effect a Main Clause)
2a       Indirect Statement Begins (excidisse supplied from 2b)
2b       Indirect Statement Concludes
3a       Conditional Clause Begins
4a            Indirect Statement Begins (supply perīre from 4b)
4b            Indirect Statement Concludes
3b       Conditional Clause Concludes
1a First Main Clause
1b Second Main Clause (supply erat)
1c Third Main Clause
2a       Comparison Clause Begins
3            Temporal Clause
2b       Comparison Clause Concludes
1a Main Clause Begins
2a       Participial Phrase Begins
1b Main Clause Concludes
2b       Participial Phrase Concludes