Madrigal (English or Chaucerian)

The Madrigal is a repeating form, written in iambic pentameter (the "natural" meter of English, apparently) -- the scheme goes like this:

A (first repeater)
B1 (second repeater)
B2 (third repeater)

a
b
A (first repeater)
B1 (second repeater)

a
b
b
A (first repeater)
B1 (second repeater)
B2 (third repeater)

Mourning the Lilly Maid

Why should I leave such thoughts? I am of Earth
The Lilly Maiden's sighs were oft misread
She could have saved his soul, but now she's dead

Her tender heart, ill-fated passion's berth
For Lancelot, who would betray instead
Why should I leave such thoughts? I am of Earth
The Lilly Maiden's sighs were oft misread

Her blood was hot, her eyes were full of mirth
So young she was, her life stretched out ahead
But now the boatman steers her final bed
Why should I leave such thoughts? I am of Earth
The Lilly Maiden's sighs were oft misread
She could have saved his soul, but now she's dead.