What happens when a poet lets his pen run aimlessly away?

What happens when a poet lets his pen
Run aimlessly away,
In the mid afternoon?
Soon
Maybe
He will write of a tree
Or some such thing.
Perchance he will talk of cabbages and kings.
But no, that would be to steal Mr Carroll’s words,
A thing not heard
Of amongst honest men,
Who dip their pen
In blood red ink
And think
Of original ideas.
Perchance they speak of wasted years
And tears that fall
And how all love turns to gall.
But there is, I fear
Nothing original here,
So I shall compose a verse...