pmda wrote:Albula, quem 'Tiberim' mersus Tiberinus in undis
reddidit, hibernis forte tumebat aquis:
Two things I really don't understand are:
1. What is 'quem' doing here? What noun is it referring to... and why is it in that case?
2. What is the subject of reddidit? Albula?
Your confusion is understandable. The antecedent of quem
is Albula. Ovid may simply be treating it as a masculine proper noun. On the other hand, he may be taking the antecedent to be not strictly Albula
but a generalised amnis
, or, more likely, he has attracted the relative to the gender of the complement Tiberim
, which again is masculine (usually!).
The subject of reddidit
is the noun phrase mersus Tiberinus
("the drowned Tiberinus").