Fenway and Arrietty, as described by Fenway "Seuss" Bartholomule

Up mule, down mule, tan mule, brown mule,
plump mule, round mule, stroll through town mule.
This one sparkles like a star,
This one has a great big scar.
Say, what delightful mules they are! 
Yes, one is brown and one is tan,
Both are lovely, both are grand.
One's a molly, one's a john,
Both mules bray a pretty song.
Why do they bray a pretty song?
To make you bring some hay along!
They both eat hay, it makes them fat,
They like to eat and stay like that.
From there to here, from here to there,
Lovely mules are everywhere.
Every day, they like to eat.
They eat, and eat, and eat, and eat.
Oh me, oh my! Oh me, oh my!
When eating's done, they trot on by.
One has big hooves, one has small,
The big-hooved one is slightly tall.
Where do they trot to?
I shall say.
They trot into the maples' shade.
We see them come, we see them go,
They're sometimes fast and sometimes slow.
One is high, and one is low.
Both of them are truly splendid—
(Sadly, now my poem's ended).