Epistulae VI 16 20-22

1                 Temporal Clause
2a Parenthetical Main Clause Begins (eō = eō diē)
3       Relative Clause
2b Parenthetical Main Clause Concludes (tertius = tertius diēs erat)
2c Second Main Clause (supply est with inventum)
3       Comparison Clause
2d Third Main Clause (supply erat)
1a First Main Clause (supply erāmus)
1b Second Main Clause (supply id pertinet)
1c Third Main Clause
1 Main Clause
1 Main Clause
2a       Indirect Statement Begins
3a            First Relative Clause
3b            Second Relative Clause Begins
4                 Temporal Clause
3c            Second Relative Clause Concludes
2b       Indirect Statement Concludes
1a First Main Clause
1b Second Main Clause
2a       Infinitive Phrase (scrībere supplied from 2d)
1c Third Main Clause (est supplied from 1b)
2b       Infinitive Phrase (scrībere supplied from 2d)
1d Fourth Main Clause (est supplied from 1b)
2c       Infinitive Phrase (scrībere supplied from 2d)
1e Fifth Main Clause (est supplied from 1b)
2d       Infinitive Phrase
1 Main Clause