I have had an epiphany!

When William Butler Yeats
was born he had a deformed Siamese Twin.

The Dublin doctor looked at them 
and gravely shook his head,
and as per nineteenth-century medicine,

decided that the sickly little 
runt, the lesser one,
was less than human, should be cut away

and left to die.  But when the parson
heard of this, he called
the folk of Sandymount to come and pray.

The parish came together and 
their fervent prayers went out
for that pathetic excuse for a human.

And God, in his great mercy and 
his omnipresent wisdom,
decided this sick soul should live again.