Lorick #38:

An eponymous epic am I;

With marsh mother and monster I vie

Hailed as hero -- their bane --

Become king, long I reign

Dealt draconic defeat, so I died.

But first, we solve #39 - here it is one last time:

I am known for my hair, once so fine!

Through injustice was made serpentine!

Thence my looks petrified -

I gave birth as I died -

my head bagged, and despoiled, and enshrined!