Aeneid VI 788-800

1a           Main Clause Begins
1b Main Clause Concludes
1 Main Clause (supply est)
2       Participial Phrase
1a First Main Clause Begins (supply est from 1b)
1b First Main Clause Continues
2       Relative Clause (Indirect Statement within)
1c First Main Clause Concludes
3a       Relative Clause Begins
4a            Participial Phrase Begins
3b       Relative Clause Continues
4b            Participial Phrase Concludes
3c       Relative Clause Concludes
1d Second Main Clause
5       Relative Adverbial Clause
6            Adjectival Phrase
1a Main Clause Begins
1b Main Clause Concludes